Graphs of Functions (Edexcel GCSE Maths: Higher)

Exam Questions

3 hours55 questions

1 mark

Brogan needs to draw the graph of $y = x^{2} + 1$

Here is her graph.

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

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$x$	$- 3$	$- 2$	$- 1$	$0$	$1$	$2$	$3$
$y$			$3$	$0$			$15$

$x$	$- 2$	$- 1$	$0$	$1$	$2$
$y$		$3$			$3$

$x$	$0.5$	$1$	$2$	$3$	$4$	$5$	$6$
$y$		$6$	$3$		$1.5$		$1$

$x$	$0.5$	$1$	$2$	$4$	$5$	$8$
$y$		$4$	$2$

$x$	0.25	0.5	1	2	4	8
$y$	16.25					8.5

Description of function	Graph
$f (x)$ is inversely proportional to $x$
$f (x)$ is a trigonometrical function
$f (x)$ is an exponential function
$f (x)$ is directly proportional to $\sqrt{x}$

x	0	5	10	15	20
N	0.45	0.63		1.24

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