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WAEC Further Mathematics 2007 Question 6

Question 6

Coordinate Geometry

The gradient of the line passing through the points P(4, 5) and Q(x, 9) is ½. Find the value of x.

  1. A.−4
  2. B.0
  3. C.4
  4. D.12
Show the answer and explanation

Answer: D (12)

Explanation

Gradient = (9 − 5)/(x − 4) = ½, so x − 4 = 8 and x = 12.