On the x intercept of the graph, the y value is always 0. We can substitute y with 0. Therefore 4x-2(0)=-8. 4x=-8. x=-8/4= -2
Hence coordinates of x interfept = (-2,0)
On the y intercept, the x coordinate is 0. Hence 4(0) -2y = -8
-2y= -8
y=-8/-2 = 4
Y intercept coordinate is (0.4)