Mathematics 0580 · IGCSE · Ratio and proportion

Ratio and proportion — practice question

This gives $y \propto \frac{1}{\sqrt{x}}$.

(a)[3]

Find the value of $y$ for $x = 36$.

(b)[1]

When $x$ is increased by a factor of 4, $y$ changes by a factor of $p$. Find $p$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The answer is $\pm 1$.” …