What is the slope of a line, in the standard $(x,y)$ coordinate plane, that is parallel to $x+5y=9$ ?

$-5$

$-\dfrac{1}{5}$

$\dfrac{1}{5}$

$\dfrac{9}{5}$

$9$

Approach

If the line is parallel, it must have the same slope as the other line.

$$ x+5y=9 $$ $$ 5y=-x+9 $$ $$ y = -\frac{1}{5}x+\frac{9}{5} $$