# How do you find the slope given (3,-6) and (3,-9)?

##### 1 Answer
Feb 16, 2016

The slope is not defined.

#### Explanation:

The points are :
(3,-6) = color(blue)(x_1,y_1

(3,-9) = color(blue)(x_2,y_2

The slope is found using formula:

slope $= \frac{{y}_{2} - {y}_{1}}{{x}_{2} - {x}_{1}}$

$= \frac{- 9 - \left(- 6\right)}{3 - 3}$

$= \frac{- 9 + 6}{0}$

$= - \frac{3}{0}$ which is not defined

A vertical line does not have a slope, since it does not exist it is not defined.