Calculate the gradient (slope) of the joining points (-1, 1) and (2, -2)
MATHEMATICS
WAEC 2017
Calculate the gradient (slope) of the joining points (-1, 1) and (2, -2)
- A. -1
- B. \(\frac{-1}{2}\)
- C. \(\frac{1}{2}\)
- D. 1
Correct Answer: A. -1
Explanation
Gradient = m = \(\frac{y_2 - y_1}{x_2 - x_1}\)
= \(\frac{-2 -1}{2 + 1}\)
= \(\frac{-3}{3}\)
= -1
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