Answer:
m = Undefined
Step-by-step explanation:
The slope = [tex]\frac{y2-y1}{x2-x1}[/tex]
Given the points (-1, 3) and (-1, -1), plug the points in you have:
m = [tex]\frac{-1-3}{-1-(-1)}[/tex] = [tex]\frac{-4}{0}[/tex] = undefined
Since the denominator is 0, this means the slope is undefined.
