Graphs of Functions (Edexcel IGCSE Maths)

Exam Questions

3 hours41 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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1 mark

The graph of y = x3x2 − 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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15
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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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16
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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 begin mathsize 16px style y equals x cubed end style

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 x squared long dash x long dash space 6

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

1c
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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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2
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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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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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4a
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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
4b
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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

4c
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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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5a
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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  
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 1 for values of x spacefrom long dash 2 space to space 4

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

5c
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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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6a
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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  

6b
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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

6c
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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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7a
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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.

7b
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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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8
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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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9a
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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

9b
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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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10
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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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11a
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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

11b
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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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1a
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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  
1b
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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

1c
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2 marks

Solve  x squared minus 2 x minus 2 equals 1

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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 space 2 x long dash space 1

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

2c
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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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3a
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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]
3b
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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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4a
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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    

4b
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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

4c
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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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5
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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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6a
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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.

6b
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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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7a
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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  

7b
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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

7c
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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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8
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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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9
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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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10a
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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.

10b
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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.

10c
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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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11a
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3 marks

Write x squared space plus space 4 x space minus space 16 in the form open parentheses x space plus space a close parentheses squared space minus space b.

11b
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3 marks

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

q18b-paper5-nov2018-ocr-gcse-maths

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12a
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3 marks

Write  begin mathsize 16px style x squared minus 10 x plus 22 end style  in the form  open parentheses x minus a close parentheses squared minus b.

12b
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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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13a
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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............................

13b
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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.............................. open square brackets 2 close square brackets end cell end table

(ii)begin mathsize 10px style table row blank row blank end table end style

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

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

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14a
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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

14b
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5 marks

The sketch shows part of a graph which has equation begin mathsize 16px style y equals a x squared plus b x plus c end style.

q19b-paper5-june2017-ocr-gcse-maths

Find the values of space a comma space b spaceand begin mathsize 16px style c end style.

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

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