Question 329978
 y=x+7 (red line)
 y=-x+2 (green line)
{{{ graph( 300, 200, -8, 5, -10, 10, x +7, -x +2 ) }}} (graph 300x200 pixels, x from -8 to 5, y from -10 to 10, of TWO functions x +7 and -x +2).