Each of the following tables defines a relationship between an input x and an output y. Which of the relationships represent functions? table a x -8 -3 0 6 y 24 4 9 72 table b x 9 15 24 38 y -14 -16 53 29 table c x 15 24 24 100 y -16 53 29 7 table d x -8 6 0 6 y 24 4 9 72 a. Table a and table c b. Table a and table b c. Table b and table c d. Table c and table d.