Answer
$-4$;
$-4$
Work Step by Step
RECALL:
(i) The linear equation $y=mx+b$ has $m$=the slope and $b$=the y-intercept.
(ii) Parallel lines have equal slopes.
The given equation has $m=-4$, so the slope of the line is $-4$.
Thus, any line that is parallel to the given line also has a slope of $-4$.
