Question

Find the Slope (9,5) (9,-3)

Answer 1

Given points (9,5) = (x1, y1) & (9, -3) = (x2 , y2)
Slope = y2 -y1/ x2 - x1
= -3-5 /9-9
= -8/ 0
As the denominator is zero the slope is ND (not defined)