Variation

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Question 19

waecmaths question: 

The table below satisfies the relation $y=k\sqrt{x}$ , where k is a positive constant. Use it to answer  18 and 19

x

1

4

p

y

0.5

1

2.5

Question 4

waecmaths question: 

The distance, d, through which a stone falls from rest varies directly as the square of the square of the time, t, taken. If the stone falls 45 cm in 3 seconds, how far will it fall in 6 seconds.