Question

Find the slope of the line that passes through the points $(2,0)$ and $(2,4)$

Answer 1

Since slope of line passing through two points $(x_1,y_1)$ and $(x_2,y_2)$ is $m=\frac{y_2-y_1}{x_2-x_1}$.

We now find the slope of the line passing through the points $(2,0)$ and $(2,4)$ as shown below:

$m=\frac{4-0}{2-2}=\frac{4}{0}=$undefined

Therefore, the slope of the line is undefined.