WAEC Mathematics 2017 Objective — Question 23
Question 23 of 50 from the West African Examinations Council (WAEC) Mathematics 2017 Objective paper, with the correct answer and a full explanation.
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Calculate the gradient (slope) of the line joining points (-1, 1) and (2, -2).
- A. A. -1Correct
- B. B. -1/2
- C. C. 1/2
- D. D. 1
Explanation
Gradient = (y2-y1)/(x2-x1) = (-2-1)/(2-(-1)) = -3/3 = -1.
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