GCSEMathsEdexcelHigherExam Questions3. Ratio, Proportion & Rates of ChangeDirect & Inverse Proportion

Direct & Inverse Proportion (Edexcel GCSE Maths: Higher): Exam Questions

Exam code: 1MA1

4 hours60 questions

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3 marks

Here is a list of ingredients for making 18 scones.

Farah wants to make 45 scones.

How much of each ingredient will Farah need?

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2 marks

These graphs show four different proportionality relationships between $y$ and $x .$

Match each graph with a statement in the table below.

Proportionality relationship	Graph letter
$y$ is directly proportional to $x$
$y$ is inversely proportional to $x$
$y$ is proportional to $x^{2}$
$y$ is proportional to $x^{3}$

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	day 1	day 2	day 3	all other days
Number of machines working	3	4	5	6

$x$	1.5	2	3	4
$y$	16	9	4	2.25

$□$	$V$ is directly proportional to $H$
$□$	$V$ is inversely proportional to $H$
$□$	$V$ is directly proportional to $\frac{1}{H}$
$□$	$V$ is inversely proportional to $\frac{1}{H}$

$x$	$1$	$2$	$3$	$4$
$y$	$9$	$2 \frac{1}{4}$	$1$	$\frac{9}{16}$