To graph the line with a slope of -4 and a y-intercept of 8, you can start by plotting the y-intercept point on the y-axis, which is (0, 8). Then, use the slope to find additional points on the line. Since the slope is -4, you can move down 4 units and to the right 1 unit to find another point on the line. Plot this point and draw a straight line through both points to complete the graph. The resulting line will be a straight line that slopes downward to the right and passes through the points (0, 8) and (1, 4).