WAEC 2020 · Paper 1 · Q42

$x$	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 of the line.

Worked solution (try it first)

Use any two points, for example the first two: the change in $y$ is $5.20 - 3.90 = 1.30$ .
The change in $x$ is $6.85 - 6.20 = 0.65$ .
Gradient $= \frac{1.30}{0.65} = 2$ , option B.