waecmaths question:
Find the gradient of the line joining the points (2 ,– 3) and (2,5)
Option A:
0
Option B:
1
Option C:
2
Option D:
undefined
waecmaths solution:
$\begin{align} & ({{x}_{1}},{{y}_{1}})=(2,-3) \\ & ({{x}_{2}},{{y}_{2}})=(2,5) \\ & Gradient=m=\frac{{{y}_{2}}-{{y}_{1}}}{{{x}_{2}}-{{x}_{1}}}=\frac{5-(-3)}{2-2}=\frac{8}{0}=undefined \\\end{align}$
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