# What is the slope of the line through points (1,9) and (1,-5)?

May 6, 2016

The pair of points have no slope.

#### Explanation:

$\left(1 , 9\right) = \textcolor{b l u e}{{x}_{1} , {y}_{1}}$

$\left(1 , - 5\right) = \textcolor{b l u e}{{x}_{2} , {y}_{2}}$

Slope is calculated using formula:
Slope = color(blue)((y_2 - y_1)/ (x_2 - x_1) (change in$y$ axis divided by change in $x$ axis)

$= \frac{- 5 - 9}{1 - 1}$

$= \frac{- 14}{0} =$ not defined.

The pair of points have no slope.