# How do you find the slope and intercept of x + 1 = 0?

$x + 1 = 0$ is the equation of a vertical line.
The line has $x$ intercept $- 1$. It does not have a $y$ intercept.
It can be written $x = - 1$, but it cannot by written in slope intercept form ($y = m x + b$) because it does not have a slope and it does not have a $y$ intercept.