Question

Which of the following is not a function?(1 point)
Responses

{(1, 2), (2, 3), (3, 4)}
{(1, 2), (2, 3), (3, 4)}

{(0, 1), (1, 0), (2, 2)}
{(0, 1), (1, 0), (2, 2)}

{(7, 8), (8, 9), (9, 10)}
{(7, 8), (8, 9), (9, 10)}

{(5, 6), (6, 7), (5, 8)}
{(5, 6), (6, 7), (5, 8)}

Answer 1

{(5, 6), (6, 7), (5, 8)} is not a function — the input 5 is paired with two different outputs (6 and 8), so it fails the definition of a function.