Identify the type of graph of the polar equation r = 9 cos 0 How can the graph of r = 9 cos 0 best be described? A circle centered along the line 0 = - not at the pole A circle centered along the line 0 = = not at the pole A limacon with an inner loop A limacon with no inner loop and no dimple A lemniscate symmetric about the pole and the line 0 = - A rose with 9 petal(s) A cardioid A rose with the endpoint of one petal lying along the line 0 = 0 A circle centered along the line 0 = 0 not at the pole A circle centered at the pole A line that is horizontal A limacon with a dimple A rose with 18 petal(s)