Mathematics 4024 · O Level · Ratio and proportion

Ratio and proportion — practice question

$y$ varies inversely as the square of $x$. If $x=4$, then $y=10$.

(a)[2]

Find the corresponding value of $y$ for $x=10$.

(b)[1]

Describe what happens to $y$ when $x$ is halved.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct application of inverse square” …