Four graphs are shown below representing the proportionality between y y\,y and xxx.
W
X
Y
Z
Note: Graph W is a straight line through the origin, Graph X is a curve that is asymptotic to the axes, Graph Y is a curve asymptotic to the axes that decreases faster than X, and Graph Z is a parabolic curve.
Match each graph with a statement in the table below.
| Proportionality relationship | Graph letter |
|---|---|
| y y\,y is directly proportional to xxx | |
| y y\,y is inversely proportional to xxx | |
| y y\,y is directly proportional to x2x^2x2 | |
| y y\,y is inversely proportional to x2x^2x2 |
43 exam-style questions on AQA GCSE Maths Direct and Inverse Proportion. Each one has a worked solution and a mark scheme showing where the marks go.