Mathematics 0580 · IGCSE · Ratio and proportion

Ratio and proportion — practice question

$y$ varies inversely with the cube of $(x - 1)$. $y = 9.45$ when $x = 3$.
(main)[3]

Find the value of $y$ when $x = 4$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Use $y=\frac{k}{(x-1)^{3}}$, then substitute $x=4$.” …

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