Graph x+3=0

$x + 3 = 0$

Subtract $3$ from both sides of the equation.

$x = - 3$

Since $x = - 3$ is a vertical line, there is no y-intercept and the slope is undefined.

Slope: Undefined

y-intercept: No y-intercept

Find two points on the line.

$\begin{array}{c} x & y \\ - 3 & 0 \\ - 3 & 1 \end{array}$

Graph the line using the slope, y-intercept, and two points.

Slope: Undefined

y-intercept: No y-intercept

$\begin{array}{c} x & y \\ - 3 & 0 \\ - 3 & 1 \end{array}$