WAEC Mathematics 2007 Question 4

Question 4

Variation

If p ∝ 1/q, which of the following is true?

  1. A.q ∝ p2
  2. B.q ∝ 1/p2
  3. C.q ∝ √p
  4. D.q ∝ 1/p
Show the answer and explanation

Answer: D (q ∝ 1/p)

Explanation

p = k/q means pq = k, so q = k/p: q varies inversely as p.