Chapter 4 - Section 4.1 - Solving Systems of Linear Equations by Graphing - Exercise Set - Page 290: 20

$(-1,-2)$

Please see the screenshot of the tables for the two equations. Green line: $y=-3x-5$ Purple line: $y=x-1$ If we replace $x$ and $y$ with $-1$ and $-2$, respectively, for the green line, we have $y=-3x-5$ $-2=-3*(-1)-5$ $-2=3-5$ (true) For the purple line: $y=x-1$ $-2=-1-1$ $-2=-2$ (true) Green line: $m=-3$, y-intercept is -5 Purple line: $m=1$, y-intercept is -1