x 6.20 6.85 7.50
y 3.90 5.20 6.50
The points on a linear graph are as shown in the table. Find the gradient (slope) of the line.
  • A 2\(\frac{1}{2}\)
  • B 2
  • C 1
  • D \(\frac{1}{2}\)
waec 2020mathematics

The correct answer is B. 2

Gradient = \(\frac{y_2 - y_ 1}{x_2 - x_1}\)

= \(\frac{5.20 - 3.90}{6.85 - 6.20}\)

= \(\frac{1.3}{0.5}\) 

= 2

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