Question

How do I find the slope of the line which passes through the points `(-10, -9)` and `(-10, 8)`?

Answer 1

The slope is undefined

Explanation:

Given: (-10, -9), (-10, 8)#

slope `= m = (y_2 - y_1)/(x_2 - x_1) = (8 - -9)/(-10 - -10)= 17/0 = "undefined"`

The slope is undefined. This means the line is a vertical line.