2025 IGCSE 0580 May/June P22 Q20

2025 IGCSE 0580 May/June P22 Q20

4 marks

\(y\propto\dfrac1{\sqrt x}\)

  1. When \(x=9\), \(y=2\).
    Find the value of \(y\) when \(x=36\).[3]
  2. When \(x\) is increased by a factor of \(4\), the value of \(y\) changes by a factor of \(p\).
    Find the value of \(p\).[1]

Solution:

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Answer:(a) \(y=1\). (b) \(p=\dfrac12\).

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