Question 127469
X-Y=8 OR -Y=-X+8 OR Y=X-8 (RED LINE)
2X+Y=7 OR Y=-2X+7 (GREEN LINE)
{{{ graph( 300, 300, -10, 10, -10, 10, x -8, -2x +7) }}} (graph 300x300 pixels, x from -10 to 10, y from -10 to 10, of TWO functions x -8 and -2x +7).