Which set of ordered pairs does not show y as a function of x? AO{(3,-2); (5,-3); (7,-4); (9,-5)} B.O{(3,-2); (6,-2); (9,-2); (12,-2)} CO{(4, -2); (5,-3); (6,-4); (7,-5)} D.O{(4,-2); (5,-3); (4,-8); (5,-9)}​