Answer
$\displaystyle \frac{1}{5}$
Work Step by Step
$y=mx+b$
is the slope intercept form: slope m and y-intercept b.
So, we solve $x=5y$ for y (divide both sides by 5):
$y=\displaystyle \frac{1}{5}x$
so, m=$\displaystyle \frac{1}{5}$