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WAEC Mathematics 2001 Question 13

Question 13

Linear and Simultaneous Equations

Given that y = px + q and y = 5 when x = 3, while y = 4 when x = 2, find the values of p and q.

  1. A.p = 1, q = 3
  2. B.p = 1, q = 2
  3. C.p = −2, q = 3
  4. D.p = 3, q = −2
Show the answer and explanation

Answer: B (p = 1, q = 2)

Explanation

3p + q = 5 and 2p + q = 4. Subtracting gives p = 1, then q = 2.