WAEC 2023 · Paper 1 · Q49

Coordinate geometry

Find the gradient of the line passing through the points $\left(\frac12, -\frac13\right)$ and $\left(3, \frac23\right)$ .

Worked solution (try it first)

The change in $y$ is $\frac23 - \left(-\frac13\right) = 1$ .
The change in $x$ is $3 - \frac12 = \frac52$ .
Gradient $= 1 \div \frac52 = \frac25$ , option D.

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