# What is the slope of the line that contains the points (-1, -1) and (3, 15)?

Jun 12, 2018

$m = 4$

#### Explanation:

The equation to find slope is

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

It does not matter which coordinate is used as $1$ or $2$ as long as there is consistency.

So let’s plug in the coordinates into the equation:

$m = \frac{- 1 - 15}{- 1 - 3}$

$m = \frac{- 16}{-} 4$

$m = 4$

Hope this helps!