# How do you calculate the slope of (0,0) and (2,-4)?

Jul 15, 2015

$m = - 2$

#### Explanation:

In order to find the slope from two points, use the equation $m = \frac{{y}_{2} - {y}_{1}}{{x}_{2} - {x}_{1}}$, where $m$ is the slope, and $\left({x}_{1} , {y}_{1}\right)$ and $\left({x}_{2} , {y}_{2}\right)$ represent the two points.

$\left({x}_{1} , {y}_{1}\right) = \left(0 , 0\right)$ and $\left({x}_{2} , {y}_{2}\right) = \left(2 , - 4\right)$.

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

$m = \frac{- 4 - 0}{2 - 0} = \frac{- 4}{2} = - 2$

$m = - 2$