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WAEC Mathematics 2020 Objective — Question 42

Question 42 of 50 from the West African Examinations Council (WAEC) Mathematics 2020 Objective paper, with the correct answer and a full explanation.

The points on a linear graph are as shown in the table (x: 6.20, 6.85, 7.50; y: 3.90, 5.20, 6.50). Find the gradient (slope) of the line.

A. 2 1/2
B. 2Correct
C. 1
D. 1/2

Explanation

Gradient = (y2-y1)/(x2-x1) = (5.20-3.90)/(6.85-6.20) = 1.3/0.65 = 2.

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