Write the relation as a set of ordered pairs.   x –3 0 3 y –6 0 6 a. ordered pairs: {(–3, –6), (0, 0), (3, 6)} b. ordered pairs: {(–6, –3), (0, 0), (6, 3)} c. ordered pairs: {(–6, –3), (0, 0), (3, 6)} d. ordered pairs: {(–3, –6), (0, 0), (6, 3)}   select the best answer from the choices provided