Answer
$ a.\quad$Intercepts: $(3.6,0)$ , $(0,6)$
$b.$
Work Step by Step
$\begin{array}{ll}
\text{x-intercept} & \text{y-intercept}\\
(y=0) & (x=0)\\
& \\
5x+3(0)=18 & 5(0)+3y=18\\
5x=18 & 3y=18\\
x=3.6 & y=6\\
& \\
(3.6,0) & (0,6)
\end{array}$
Draw a line through the two points.