Answer
$y=\frac{1}{3}x-\frac{1}{3}$
Work Step by Step
$y=mx+b$
The slope is $\frac{1}{3}$, therefore the coefficient of $x$ will be $\frac{1}{3}$. ($m=\frac{1}{3}$)
$(0,-\frac{1}{3})$ is a point of the line (if $x=0$ then $y=-\frac{1}{3}$)
$-\frac{1}{3}=\frac{1}{3}*0+b$
Therefore $ b=-\frac{1}{3}$
So the equation is $y=\frac{1}{3}x-\frac{1}{3}$
