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WAEC Mathematics 2006 Question 19

Question 19

Variation

The table below satisfies the relation y = k√x, where k is a positive constant.
x: 1, 4, P
y: 0.5, 1, 2.5
Find the value of P.

  1. A.2
  2. B.4
  3. C.10
  4. D.25
Show the answer and explanation

Answer: D (25)

Explanation

With k = 0.5: 2.5 = 0.5√P, so √P = 5 and P = 25.