Graphs of Functions (Edexcel GCSE Maths)

Exam Questions

3 hours55 questions
1
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1 mark

Brogan needs to draw the graph of y space equals space x squared space plus space 1

Here is her graph.

q1-easy-2-17-graph-of-equation-edexcel-gcse-maths

Write down one thing that is wrong with Brogan's graph.

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2a
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2 marks

Complete the table of values for  y space equals space x cubed space long dash space 4 x

x negative 3 negative 2 negative 1 0 1 2 3
y     3 0     15
2b
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2 marks

On the grid, draw the graph of space y space equals space x cubed space long dash space 4 x space from x space equals space minus 3 space to space x space equals 3

q2-easy-2-17-graph-of-equation-edexcel-gcse-maths

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3a
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2 marks

Complete the table of values for y space equals space x cubed space long dash space 3 x space plus space 1

x negative 2 negative 1 0 1 2
y   3     3
3b
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2 marks

On the grid, draw the graph of y space equals space x cubed space long dash space 3 x space plus space 1 for values of x from long dash 2 space to space 2

q3-easy-2-17-graph-of-equation-edexcel-gcse-maths

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4a
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2 marks

Complete the table of values for y equals space 6 over x

x 0.5 1 2 3 4
5
6
y   6 3   1.5
  1
4b
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2 marks

q4-easy-2-17-graph-of-equation-edexcel-gcse-maths

On the grid, draw the graph of y space equals space 6 over x space for space space 0.5 space less-than or slanted equal to space x space less-than or slanted equal to space 6

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5a
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2 marks

Complete the table of values for y space equals space 4 over x

x 0.5 1 2 4
5
8
y   4 2      
5b
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2 marks

On the grid, draw the graph of space y space equals space 4 over x for 0.5 space less-than or slanted equal to space x space less-than or slanted equal to space 8

q5b-easy-2-17-graph-of-equation-edexcel-gcse-maths

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6a
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1 mark

The graph of y space equals space straight f left parenthesis x right parenthesis is drawn on the grid.

q6a-easy-2-17-graph-of-equation-edexcel-gcse-maths

Write down the coordinates of the turning point of the graph.

6b
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1 mark

Write down the roots of straight f left parenthesis x right parenthesis space equals space 2

6c
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1 mark

Write down the value of space straight f left parenthesis 0.5 right parenthesis

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7a
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1 mark

The graph of y space equals space straight f left parenthesis x right parenthesis is drawn on the grid.

q7a-easy-2-17-graph-of-equation-edexcel-gcse-maths

Write down the coordinates of the turning point of the graph.

7b
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1 mark

Write down estimates for the roots of space straight f left parenthesis x right parenthesis equals 0

7c
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1 mark

Use the graph to find an estimate for straight f left parenthesis 1.5 right parenthesis

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8a
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2 marks

Complete the table of values for  y equals 1 over x open parentheses x squared plus 4 close parentheses

x 0.25 0.5 1 2 4 8
y 16.25         8.5

8b
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2 marks

On the grid, draw the graph of  y equals 1 over x open parentheses x squared plus 4 close parentheses for 0.25 less-than or slanted equal to x less-than or slanted equal to 8

q15b-4ma1-2h-qp-june21-paper2-igcse-maths

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9
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3 marks

Here are six graphs.

q15-4ma1-2h-qp-jan20-paper2-igcse-maths

Complete the table below with the letter of the graph that could represent each given equation.

Write your answers on the dotted lines.

Equation Graph
y space equals space 2 over x squared ....................
y space equals space minus space 1 half x cubed ....................
y space equals space minus 5 over x ....................

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10a
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2 marks

The diagram shows part of a sketch of the curve space y space equals space sin space x degree

q16-paper2h-spec2016-edexcel-igcse-maths

Write down the coordinates of

i)
the point P
[1]
ii)
the point Q
[1]
10b
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2 marks

Sketch the graph of y space equals space tan space x for 0 degree space less-than or slanted equal to space x space less-than or slanted equal to space 360 degree

Show the coordinates of any points of intersection with the coordinate axes.

q16b-paper2h-spec2016-edexcel-igcse-maths

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11a
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2 marks

Complete the table of values for y equals 6 over x

x 0.5 1 2 3 4 5 6
y   6   2     1

11b
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2 marks

On the grid, draw the graph of  y equals 6 over x  for 0.5 less-than or slanted equal to x less-than or slanted equal to 6

q11b-4ma1-2hr-qp-jan22-paper2-igcse-maths

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12
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1 mark

Circle the point that is on the graph of y space equals space 1 over x

(–1, 1)  (0.3, 3) (0.8, 0.2) (2.5, 0.4)

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13
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1 mark

The equation of a curve is space y space equals space left parenthesis x space – space 1 right parenthesis squared space – space 6 space

Circle the coordinates of the turning point.

(–1, –6) (1, 6) (–1, 6) (1, –6)

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14
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2 marks

Sketch the graph of y = 3x

Give the value of the y-intercept.

q17-paper4-nov2019-ocr-gcse-maths

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15
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2 marks

Shirley is asked to sketch a graph of  y = 5x for x > 0

She produces the following.

q13-paper5-june2019-ocr-gcse-maths

The graph has two errors.

How should they be corrected?

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16
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1 mark

The graph of y = x3 − x2 − 2 is drawn on the grid.

q19-paper5-june2019-ocr-gcse-maths

Use the graph to solve x3 − x2 − 2 = 0.
Give your answer correct to 1 decimal place.

x = ................................................... 

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17
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2 marks

Here is the graph of   y = x2 + x − 6.

q10-paper4-nov2018-ocr-gcse-maths

Use the graph to solve the equation  x2 + x − 6  = 0.

x = ................. or x = ...............

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18
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2 marks
i)
Sketch a graph on the axes that shows that y is directly proportional to x.

q4ai-paper4-spec2015-ocr-gcse-maths

[2]

ii)
Sketch a graph on the axes that shows y equals x cubed

q4aii-paper4-spec2015-ocr-gcse-maths
[2]

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1a
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2 marks

Complete the table of values for y space equals space 2 to the power of x

x negative 2 negative 1 0 1 2 3
y 0.25     2    

1b
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2 marks

On the grid, draw the graph of y space equals space 2 to the power of x for values of x from long dash 2 space to space 3

q1-medium-2-17-graph-of-equation-edexcel-gcse-maths

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2a
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2 marks

Complete the table of values for y space equals space x squared long dash x long dash space 6

x negative 3
negative 2 negative 1 0 1 2 3
y 6     negative 6      
2b
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2 marks

On the grid, draw the graph of y space equals space x squared space long dash x long dash space 6 for values of x from long dash 3 space to space 3

q2-medium-2-17-graph-of-equation-edexcel-gcse-maths

2c
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2 marks

Use your graph to find estimates of the solutions to the equation space x squared space minus x minus 6 space space equals long dash 2

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3a
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1 mark

The diagram shows part of a sketch of the curve y space equals space sin space x to the power of ring operator.

q3-medium-2-17-graph-of-equation-edexcel-gcse-maths

Write down the coordinates of the point P.

3b
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1 mark

Write down the coordinates of the point Q.

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4
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3 marks

Here are some graphs.

q4-medium-2-17-graph-of-equation-edexcel-gcse-maths

In the table below, match each equation with the letter of its graph.

Equation  Graph
y space equals space sin space x  
y space equals space x cubed space plus space 4 x  
y space equals space 2 to the power of x  
y space equals space 4 over x  

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5a
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2 marks

Complete the table of values for space y space equals space x squared minus 3 x space plus space 2

bold italic x negative 1 0 1 2 3 4 5
bold italic y 6       2   12
5b
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2 marks

On the grid, draw the graph of y space equals space x squared space long dash space 3 x space plus space 2 for values of x from long dash 1 space to space 5

q5-medium-2-17-graph-of-equation-edexcel-gcse-maths

5c
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2 marks

Find estimates for the solutions of the equation x squared space minus space 3 x space plus space 2 space equals space 4

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6a
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2 marks

Complete the table of values for y space equals space x squared space minus space 3 x space plus 1

x negative 2 negative 1 0 1 2 3 4
y 11   1 negative 1   1  
6b
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2 marks

On the grid, draw the graph of y space equals space x squared space long dash space 3 x space plus space 1 for values of x spacefrom long dash 2 space to space 4

q6-medium-2-17-graph-of-equation-edexcel-gcse-maths

6c
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2 marks

By drawing a suitable straight line on the grid, find estimates for the solutions of

x squared space minus space 3 x space plus 1 space equals space 3

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7a
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2 marks

q7-medium-2-17-graph-of-equation-edexcel-gcse-maths

On the grid, draw the graph of space x squared space plus y squared space equals space 4

7b
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2 marks

Ox~7ekor_q7b-medium-2-17-graph-of-equation-edexcel-gcse-maths

On the grid, sketch the graph of y space equals space cos space x space for space 0 to the power of degree space less-than or slanted equal to space x space less-than or slanted equal to space 360 to the power of degree

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8
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2 marks

Sketch the graph of y space equals space cos space x to the power of degree space end exponent space for space 0 space less-than or slanted equal to space x space less-than or slanted equal to space 360

q8-medium-2-17-graph-of-equation-edexcel-gcse-maths

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9a
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2 marks

Part of the graph ofspace y space equals space 2 x squared minus space 4 x space minus space 1 space is shown on the grid.

q21-4ma1-2h-qp-jan22-paper2-igcse-maths

Use the graph to find estimates for the solutions of the equation 2 x to the power of 2 space end exponent minus space 4 x space minus space 1 space equals space 0

Give your solutions correct to one decimal place.

9b
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3 marks

By drawing a suitable straight line on the grid, find estimates for the solutions of the equation x to the power of 2 space end exponent minus space x space minus space 1 space equals space 0

Show your working clearly.

Give your solutions correct to one decimal place.

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10a
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1 mark

Complete the table of values for y space equals space x squared space – space 5 x space plus space 6

x 0 1 2 3 4 5
y 6   0 0 2  

10b
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2 marks

On the grid, draw the graph of y space equals space x squared space – space 5 x space plus space 6 space for space 0 space less-than or slanted equal to space x space less-than or slanted equal to space 5

q6b-paper1h-jan2019-edexcel-igcse-maths

10c
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3 marks

By drawing a suitable straight line on the grid, find estimates for the solutions of the equation

x squared space – space 5 x space equals space x space – space 7

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11
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2 marks

The diagram shows the graph of y space equals space straight f space left parenthesis x right parenthesis for negative 4 space less-than or slanted equal to space x space less-than or slanted equal to space 12

jc9uPwkM_q18-4ma1-1hr-qp-jan20-paper1-igcse-maths

Note: Point P in the graph is from the previous question. It is not required for this question.

The equation straight f space left parenthesis x right parenthesis space equals space k has exactly two different solutions for negative 4 space less-than or slanted equal to space x space less-than or slanted equal to space 12

Use the graph to find the two possible values of k.

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12a
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3 marks

Write 3 x squared space minus space 12 x space plus space 7 in the form a left parenthesis x space plus space b right parenthesis squared space plus space c

12b
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1 mark

The line bold L is the line of symmetry of the curve with equation y space equals space 3 x squared space minus space 12 x space plus space 7

Using your answer to part (a) or otherwise, write down an equation of bold L.

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13
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1 mark

Circle the point that lies on the curve  y space equals space x squared space – space 4 x space plus space 1

(–1, 4) (–1, –4) (–1, –2) (–1, 6)

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14a
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1 mark

Here is a sketch of space y space equals space cos space x spacefor values of x from 0° to 360°

q27-paper-1h-nov-2018-aqa-gcse-maths

alpha degree is an acute angle.
cos space alpha degree space equals space k

Circle the value of cos space left parenthesis 180 degree space – space alpha degree right parenthesis

1 space – space k k – k – 1 space – space k

14b
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1 mark

Circle the value of cos spaceleft parenthesis 360 degree space plus space alpha degree right parenthesis

k space – space 1 k space plus space 1 – k k

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15a
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2 marks

The number of gannets on an island is assumed to follow this exponential growth model.

N = 0.45 × 1.07x

N is the number of gannets, in thousands.
x is the number of years after 1st January 2010.

Complete the table for N = 0.45 × 1.07x.

x 0 5 10 15 20
N 0.45 0.63   1.24  

15b
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2 marks

Draw the graph of straight N space equals space 0.45 space cross times 1.07 to the power of straight x

q21b-paper4-nov2018-ocr-gcse-maths

15c
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2 marks

Use the graph to find the year when the gannet population is predicted to reach 1000.

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16
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2 marks

Sketch the graph of y space equals sin space x for 0 degree less than x less than 360 degree

q13a-paper5-nov2020-ocr-gcse-maths

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1a
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2 marks

On the grid, construct the graph of x squared space plus space y squared space equals space 16

q1-hard-2-17-graph-of-equation-edexcel-gcse-maths

1b
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3 marks

Find estimates for the solutions of the simultaneous equations

table row cell x squared space plus space y squared space end cell equals cell space 16 end cell row cell y space end cell equals cell space 2 x plus 1 end cell end table

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2a
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2 marks

On the grid, draw the graph of x squared space plus space y squared space equals space 12.25

q2-hard-2-17-graph-of-equation-edexcel-gcse-maths

2b
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3 marks

Hence find estimates for the solutions of the simultaneous equations

table row cell x squared space plus space y squared space end cell equals cell space 12.25 end cell row cell 2 x plus y end cell equals 1 end table

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3a
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2 marks

Complete the table of values for y space equals space x squared long dash space 2 x

x negative 2 negative 1 0 1 2 3 4
y   3 0     3  
3b
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2 marks

On the grid, draw the graph of space y equals space x squared long dash space 2 x spacefor values of x from long dash 2 space to space 4

q3-hard-2-17-graph-of-equation-edexcel-gcse-maths

3c
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2 marks

Solve  x squared minus 2 x minus 2 equals 1

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4a
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2 marks

Complete the table of values for y space equals space x squared long dash space 2 x long dash space 1

x negative 2 negative 1 0 1 2 3 4
y 7     negative 2 negative 1    
4b
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2 marks

On the grid, draw the graph of  y space equals space x squared long dash space 2 x long dash space 1 for values of x from long dash 2 space to space 4

q4-hard-2-17-graph-of-equation-edexcel-gcse-maths

4c
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2 marks

Solve   x squared space minus space 2 x space minus 1 space equals x plus 3

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5a
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3 marks

The diagram shows the graph of y space equals space x squared space long dash space 4 x space long dash space 2

q5-hard-2-17-graph-of-equation-edexcel-gcse-maths

Use the graph to find estimates for the solutions of

i)
x squared space minus 4 x space minus 2 space equals space 0
[1]
ii)
x squared space minus 4 x space minus 6 space equals 0
[2]
5b
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3 marks

Use the graph to find estimates for the values of x that satisfy the simultaneous equations

table row cell y space end cell equals cell space x squared space long dash space 4 x space long dash space 2 end cell row blank blank blank row cell x space plus space y space end cell equals 6 end table

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6a
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2 marks

Construct the graph of space x squared space plus space y squared space equals space 9

q6-hard-2-17-graph-of-equation-edexcel-gcse-maths

6b
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3 marks

By drawing the line x space plus space y space equals space 1 on the grid, solve the equations x squared space plus space y squared space equals space 9
x space plus space y space equals 1

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7
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2 marks

Here are four graphs.

q7-hard-2-17-graph-of-equation-edexcel-gcse-maths

The graphs represent four different types of function straight f.

Match each description of the function in the table to the letter of its graph.

Description of function Graph
straight f open parentheses x close parentheses is inversely proportional to x  
straight f open parentheses x close parentheses is a trigonometrical function  
straight f open parentheses x close parentheses is an exponential function  
straight f open parentheses x close parentheses is directly proportional to square root of x  

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8a
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2 marks

q8-hard-2-17-graph-of-equation-edexcel-gcse-maths

The graph of y space equals space k to the power of x, where k is a positive constant, is shown above.

Find the value of k.

8b
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2 marks

q8b-hard-2-17-graph-of-equation-edexcel-gcse-maths

The graph of space y equals space sin space x degree space for values of x from space long dash 270 space to space plus 270 space is shown above.

On the same axes, draw the graph of y space equals space 1 space long dash space sin space x degree for values of x from long dash 270 space to space plus 270

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9a
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1 mark

The curve C has equation y space equals space straight f left parenthesis x right parenthesis where straight f left parenthesis x right parenthesis space equals space 9 space – space 3 left parenthesis x space plus space 2 right parenthesis squared

The point A is the maximum point on bold C.

Write down the coordinates of A.

9b
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1 mark

The curve bold C is transformed to the curve bold S by a translation of open parentheses table row 4 row 0 end table close parentheses
Find an equation for the curve bold S.

9c
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1 mark

The curve bold C is transformed to the curve bold T.
The curve bold T has equation y space equals space 3 left parenthesis x space plus space 2 right parenthesis squared – space 9

Describe fully the transformation that maps curve bold C onto curve bold T.

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10
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4 marks

The curve bold space bold italic C bold spacehas equation y space equals space 4 left parenthesis x space minus space 1 right parenthesis squared space minus space a space   where a space greater than space 4

Using the axes below, sketch the curve bold italic C.
On your sketch show clearly, in terms of a,

i)
the coordinates of any points of intersection of bold italic C with the coordinate axes,

ii)
the coordinates of the turning point.
q20ii-4ma1-1h-qp-jan20-paper1-igcse-maths

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11a
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3 marks

Express 7 space plus space 12 x space – space 3 x squared in the form a space plus space b left parenthesis x space plus space c right parenthesis squared where a comma space b andspace c spaceare integers.

11b
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1 mark

bold C is the curve with equationspace y space equals space 7 space plus space 12 x space – space 3 x squared space
The point A is the maximum point on bold C

Use your answer to part (a) to write down the coordinates of A

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12a
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2 marks

Complete the table of values for y space equals space x cubed – space 2 x squared – space 3 x space plus space 4

x -2 -1 -0.5 0 1 1.5 2 3
y     4.875 4   -1.625    

12b
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2 marks

On the grid, draw the graph of y space equals space x cubed – space 2 x squared – space 3 x space plus space 4  for values of x from –2 to 3

q14b-paper2h-june2018-edexcel-igcse-maths

12c
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4 marks

By drawing a suitable straight line on the grid,
find estimates for the solutions of the equation x to the power of 3 space end exponent – space 2 x squared space – space x space plus space 1 space equals space 0

Give your solutions correct to 1 decimal place.

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13a
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2 marks

Complete the table of values for y space equals space 1 half space x cubed space – space 2 x space plus space 3

x – 3 –2 – 1 0 1 2 3
y – 4.5     3   3  

13b
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2 marks

On the grid, draw the graph of y space equals space 1 half space x cubed space – space 2 x space plus space 3 space for space – 3 space less-than or slanted equal to space x space less-than or slanted equal to space 3

q18b-paper2hr-nov2020-edexcel-igcse-maths

13c
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2 marks

By drawing a suitable straight line on the grid, find an estimate for the solution of the equation 1 half space x cubed space – space x space plus space 4 space equals space 0

x space equals............................................

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14
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1 mark

The curve bold C has equation y space equals space 3 space – space 5 left parenthesis x space plus space 1 right parenthesis squared
The point A is the maximum point on bold C.

Write down the coordinates of A.

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15
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6 marks

The curve C has equation y space equals space x squared space – space 6 x space plus space 4

Using the axes below, sketch the curve C.
On your sketch show clearly

i)
the exact coordinates of any points of intersection of C with the coordinate axes,

ii)
the coordinates of the turning point.

q21-paper1h-spec2016-edexcel-igcse-maths

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16
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1 mark

y is an obtuse angle.

Which statement is true?
Tick one box.

begin mathsize 26px style square end style sin space y space greater than space 0 and cos space y space greater than space 0
size 26px square sin space y space greater than space 0 spaceand cos space y space less than space 0
size 26px square sin space y space less than space 0 space andspace cos space y space greater than space 0
size 26px square sin space y space less than space 0 and cos space y space less than space 0

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17
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1 mark

straight f left parenthesis x right parenthesis space equals space sin left parenthesis x space – space 90 degree right parenthesis

Circle the value of f(0°)

1 0 negative 1 half -1

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18a
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3 marks

Write begin mathsize 16px style x squared space plus space 4 x space minus space 16 end style in the form open parentheses x space plus space a close parentheses squared space minus space b.

18b
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3 marks

Sketch the graph of y space equals space x squared space plus space 4 x space minus space 16 , showing clearly the coordinates of any turning points.

q18b-paper5-nov2018-ocr-gcse-maths

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19a
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3 marks

Write  x squared minus 10 x plus 22  in the form  open parentheses x minus a close parentheses squared minus b.

19b
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4 marks

Sketch the graph of y equals x squared minus 10 x plus 22 .

Show clearly the coordinates of any turning points and the value of the y-intercept.

q19b-paper5-nov2020-ocr-gcse-maths

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20a
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2 marks

The graph of y space equals space 2 x squared space plus space 3 x space minus space 9 is drawn below.

q19-paper6-nov2020-ocr-gcse-maths

Use the graph to solve 2 x squared space plus space 3 x space minus space 9 space equals space 0.

x space equals space............................ space or
x space equals space............................ space

20b
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2 marks

The equation 2x2 + x − 4 = 0 can be solved by finding the intersection of the graph of y = 2x2 + 3x − 9  and the line y = ax + b.

i)
Find the value of a and the value of b.

table row a equals cell space............................. space space end cell row b equals cell.............................. space left square bracket 2 right square bracket end cell end table

ii)table row blank row blank end table

Hence use the graph to solve the equation 2x2 + x − 4 = 0.

x = ............................ or x = ............................[3]

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21a
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3 marks

Sketch the graph of begin mathsize 16px style y equals open parentheses x minus 2 close parentheses squared minus 3 end style.
Show the coordinates of any turning points.

q19a-paper5-june2017-ocr-gcse-maths

21b
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5 marks

The sketch shows part of a graph which has equation y equals a x squared plus b x plus c.

q19b-paper5-june2017-ocr-gcse-maths

Find the values of space a comma space b spaceand c.

a space equals space....................................... space
b space equals space.......................................
c space equals space.......................................

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