68 DETAILS a Graph the polar equation r 8 cos 0 10 15 10 5 10 5 10 15 10 5 3 10 15 5 5 10 10 X 15 10 10 5 5 10 3 51 10 y 10 5 10 5 X 10 10 X What type of curve is this The graph of the polar equation consists of all points on the circle with radius 8 and center 4 0 The graph of the polar equation becomes a horizontal line at y 8 The graph of the polar equation consists of all points on the circle with radius 4 and center 4 0 The graph of the polar equation becomes a vertical line at x 8 The graph of the polar equation consists of all points on the circle with radius 4 and center 0 4 b Convert the equation to rectangular coordinates