# What is the slope of the line passing through  (10,-1);(9,9) ?

##### 2 Answers
Jul 18, 2018

slope is $- 10$

#### Explanation:

If you have 2 points $\left({x}_{1} , {y}_{1}\right)$ and $\left({x}_{2} , {y}_{2}\right)$, then your slope or gradient will be $m = \frac{{y}_{2} - {y}_{1}}{{x}_{2} - {x}_{1}}$

Therefore, $m = \frac{- 1 - 9}{10 - 9} = - 10$

Jul 18, 2018

color(blue)(" Slope " = m = -10

#### Explanation:

Slope of an equation knowing coordinates of two points on the line is given by

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

(x_1, y_1) = 910, -1), (x_2, y_2) = (9,9)