Question

Which set of ordered pairs is NOT a function? {(0,0), (1,1), (2,2), (3,3)} {(1,2), (3,4), (4,5), (5,6)} {(4,1), (5,1), (6,1), (7,1)} {(3,1), (2,1), (1,2), (3,2)}​

Answer 1

Do you not have a graph to go with it?