# How do you find the slope given (-2,-1) and (2,1)?

Jan 17, 2016

m$= \frac{1}{2}$

#### Explanation:

To find the gradient (slope) of a line joining 2 points use the 'gradient formula' .

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

where $\left({x}_{1} , {y}_{1}\right) , \left({x}_{2} , {y}_{2}\right)$ are 2 points on the line.

let $\left({x}_{1} , {y}_{1}\right) = \left(- 2 , - 1\right) , \left({x}_{2} , {y}_{2}\right) = \left(2 , 1\right)$

$\Rightarrow m = \frac{1 - \left(- 1\right)}{2 - \left(- 2\right)} = \frac{2}{4} = \frac{1}{2}$