Question

What is the slope of the line (-2,8)(-2,-1)?

Answer 1

The slope is `oo` and line is vertical and parallel to `y`-axis

Explanation:

The slope of a line joining two points `(x_1,y_1)` and `(x_2,y_2)` is

`(y_2-y_1)/(x_2-x_1)`

Hence slope of line joining `(-2,8)` and `(-2,-1)` is

`(-1-8)/(-2-(-2))`

= `-9/0=oo`

Hence the line joining `(-2,8)` and `(-2,-1)` has `oo` slope i.e. it is perpendicular meaning parallel to `y`-axis.