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
waec 2017mathematics

The correct answer is A. -1

Gradient = m = \(\frac{y_2 - y_1}{x_2 - x_1}\)

= \(\frac{-2 -1}{2 + 1}\)

= \(\frac{-3}{3}\)

= -1

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