Answer
The graphs of the two equations are not parallel lines.
Work Step by Step
RECALL:
(1) In the slope-intercept form of a line's equation $y=mx+b$, $m$=slope and $b$ is the y-coordinate of the y-intercept.
(2) Parallel lines have equal or the same slope.
Write both equations in slope-intercept form to obtain:
First Equation:
$y=3x+9$
Second Equation:
$2y=8x-2
\\\frac{2y}{2}=\frac{8x-2}{2}
\\y=4x-1$
Note that two equations have different slopes.
Thus, their graphs are not parallel lines.
