To do this, we rearrange the equation $x-3y=7$ into slope-intercept form, $y=mx+b$, where $m$ is the slope and $b$ is the y-intercept. Subtract $x$ from both sides to get $-3y=-x+7$. Then divide by $-3$ to get $y=\frac{1}{3}x-\frac{7}{3}$.
Show more…