Question 43

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waecmaths question: 

If x and y are variable and k is a constant , which of the following describes an inverse relationship between x and y

Option A: 

$y=kx$

Option B: 

$y=\tfrac{k}{x}$

Option C: 

$y=k\sqrt{x}$

Option D: 

$y=x+k$

waecmaths solution: 

$\begin{align}  & y\propto \frac{1}{x} \\ & y=\frac{k}{x} \\\end{align}$

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