WAEC Mathematics 2015 Objective — Question 21
Question 21 of 50 from the West African Examinations Council (WAEC) Mathematics 2015 Objective paper, with the correct answer and a full explanation.
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The table below shows values for a linear graph: x: 0, 1¼, 2, 4; y: 3, 5½, ?, ?. Find the gradient of the line.
- A. 1
- B. 2Correct
- C. 3
- D. 4
Explanation
Gradient m = (y₂−y₁)/(x₂−x₁) = (5.5−3)/(1.25−0) = 2.5/1.25 = 2.
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