# How do you find the slope and y intercept for y + x = 0 ?

Dec 6, 2015

The slope $m$ is $- 1$ and the y-intercept is $0$.

#### Explanation:

Convert $x + y = 0$ to slope-intercept form, $y = m x + b$, where $m$ is the slope and $b$ is the y-intercept.

$x + y = 0$

Subtract $x$ from both sides of the equation.

$y = - x + 0$

Simplify.

$y = - x$

The slope $m$ is $- 1$ and the y-intercept is $0$.

graph{y=-x [-10, 10, -5, 5]}