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WAEC Mathematics 2015 Question 21

Question 21

Coordinate Geometry

The table shows some values for a linear graph.
x: 0, 1¼, 2, 4
y: 3, 5½, __, __
Find the gradient of the line.

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

Answer: B (2)

Explanation

Gradient = (5½ − 3)/(1¼ − 0) = 2½ ÷ 1¼ = 2.