Mathematics 0580 · IGCSE · Ratio and proportion

Ratio and proportion — practice question

The variable $y$ is inversely proportional to the square root of $(x + 1)$. When $x = 8$, $y = 2$.
(main)[3]

Determine $y$ for $x = 99$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The relation is $y=\frac{k}{\sqrt{x+1}}$.” …

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