Answer
$ a.\quad$Intercepts: $(-10,0)$ , $(0,8)$
$b.$
Work Step by Step
$\begin{array}{ll}
\text{x-intercept} & \text{y-intercept}\\
(y=0) & (x=0)\\
& \\
-4x+5(0)=40 & -4(0)+5y=40\\
-4x=40 & 5y=40\\
x=-10 & y=8\\
& \\
(-10,0) & (0,8)
\end{array}$
Draw a line through the two points.