Mathematics 0580 · IGCSE · Ratio and proportion

Ratio and proportion — practice question

The quantity $y$ varies inversely with $\sqrt{1 + x}$. At $x = 8$, $y = 2$.
(main)[3]

Determine $y$ when $x = 15$.

Worked solution & mark scheme

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

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI