Question 69971
x-y=-3 -y=-x-3 y=x+3
x-y=4 -y=-x+4 y=x-4

{{{ graph( 300, 200, -6, 5, -10, 10, y = x +3, y = x -4) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = x +3 and y = x -4).