Question

Which set of ordered pairs below is a function?
I.{(3 , 3), (6 , 1), (2 , 3)}
ll.{(4 , 7), (2 , 8), (4 , 2)}
lll. {(9 , 6), (3 , 1), (7 , 3)}

Answer 1

I. looks ok
II. has 2 values of y for x = 4. NO way
III. looks ok