Question

24. The ordered pairs in the sets below are of the form (x, y). In which set is y a function of x?

a. {(1, -2), (1, 0), (1, 5), (1, 7)}
b. {(1, 3), (2, 6), (3, 1), (6, 3)}
c. {(0, 3), (1, 4), (2, 4), (2, 8)}
d. {(1, 3), (3, 1), (3, 4), (4, 3)}