Answer
Graph:
Work Step by Step
Intercepts (set x=0, find the y; set y=0, find the x:
$\left[\begin{array}{lll}
x=0, & & y=0\\
0-3y=9 & & x-0=9 \\
-3y=9 & & x=9\\
y=-3 & & \\
(0,-3) & & (9,0)
\end{array}\right] $
Checkpoint (select any x, find the accompanying y):
$\left[\begin{array}{l}
x=4\\
(3)-3y=9 \\
-3y=6\\
y=-2\\
(3,-2)
\end{array}\right]$
Plot the points and a line that passes through them
