Question

Which of the following is not a function? (1 point)
• {7, 8), (8, 9), (9, 10)}
• {(0, 1), (1, 0), (2, 2)}
{(1, 2), (2, 3), (3, 4)}
{(5, 6), (6, 7), (5, 8)}

Answer 1

The set {(5, 6), (6, 7), (5, 8)} is not a function because the input 5 is paired with two different outputs (6 and 8). A function must assign each input exactly one output.