Find the Slope and y-intercept m=-3

The slope-intercept form is ${\displaystyle y=mx+b}$, where ${\displaystyle m}$ is the slope and ${\displaystyle b}$ is the y-intercept.

Find the values of ${\displaystyle m}$ and ${\displaystyle b}$ using the form ${\displaystyle y=mx+b}$. Since there is no ${\displaystyle y}$ and ${\displaystyle x}$ is linear, ${\displaystyle m=-3}$ is a vertical line. Vertical lines have no y-intercept and undefined slope.