Question 320039
Through (-3,-9); parallel to y=4
Y=4 is a horizontal line.Thus the slope (m)=0 
Y=mX+b
Y=0*-3-9
Y=-9 ans.
{{{ graph( 300, 200, -6, 5, -10, 10, y = -9) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = -9).