Question 141615
y=2x-2 (red line)
y=-4x+4 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, 2x -2, -4x +4) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 2x -2 and -4x +4).