Which relation is represented by the arrow diagram? a. {(–2, 0), (–1, 0), (0, 6), (2, 1), (3, 2)} b. {(–2, 0), (–1, 0), (0, 6), (2, 2), (3, 6)} c. {(0, –2), (0, –1), (6, 0), (1, 2), (2, 3)} d. {(0, –2), (0, –1), (6, 0), (2, 1), (3, 2)}