Answer
$ a.\quad$Intercepts: $(4,0)$ , $(0,-6)$
$b.$
Work Step by Step
$\begin{array}{ll}
\text{x-intercept} & \text{y-intercept}\\
(y=0) & (x=0)\\
& \\
x-\frac{2}{3}(0)=4 & (0)-\frac{2}{3}y=4\\
x=4 & -\frac{2}{3}y=4\\
& y=-\frac{3}{2}(4)=-6\\
& \\
(4,0) & (0,-6)
\end{array}$
Draw a line through the two points.