Question

(04.01 LC)
Which set of ordered pairs represents a function? (1 point)

{(0, 1), (1, 3), (1, 5), (2, 8)}
{(0, 0), (1, 2), (2, 6), (2, 8)}
{(0, 0), (0, 2), (2, 0), (2, 4)}
{(0, 2), (1, 4), (2, 6), (3, 6)}

Answer 1

@Hero

Answer 2

Will Medal

Answer 3

So by the definition of a function, each x-coordinate can only have 1 corresponding y-coordinate. So, if any of the sets have x-coordinates that are used more than once, they do not qualify as functions.
From this, you can eliminate the set of pairs which are not functions and find the only set which is a function.