How do the number line graphs of the solutions sets of mc011-1.jpg and mc011-2.jpg differ? one graph uses an open circle, but the other graph uses a closed circle. also, the rays use arrows that point in opposite directions, but they have the same endpoint. they use arrows that point in opposite directions, the rays have different endpoints, and both graphs use open circles. one graph uses an open circle, but the other graph uses a closed circle. also, the rays have different endpoints, but they use arrows that point in the same direction. they use arrows that point in opposite directions, the rays have different endpoints, and both graphs use closed circles