Question 18

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waecmaths question: 

The table below satisfies the relation $y=k\sqrt{x}$ , where k is a positive constant.

x

1

4

p

y

0.5

1

2.5

Find the value of k
Option A: 

0.5

Option B: 

1

Option C: 

1.5

Option D: 

0.2

waecmaths solution: 

\[\begin{align}  & y=k\sqrt{x} \\ & 0.5=k\sqrt{1} \\ & k=0.5 \\\end{align}\]

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