How do you find the slope given y = -3x + 2?

This equation is in the slope intercept form. The slope-intercept form of a linear equation is: $y = \textcolor{red}{m} x + \textcolor{b l u e}{b}$
Where $\textcolor{red}{m}$ is the slope and $\textcolor{b l u e}{b}$ is the y-intercept value.
$y = \textcolor{red}{- 3} x + \textcolor{b l u e}{2}$
Therefore, the slope is: $\textcolor{red}{m = - 3}$