Question

Which set of ordered pairs is NOT a function?

a. {(9,0), (5, -8), (2, 0), (4, -2)}
b. {(-2, 3), (0, 3), (-2, 0), (10,-2)}
c. {(-3, 7), (0, -5), (2, 7), (1,9)}
d. {(-4, 9), (4, 8), (6, 9), (0, 0)}

Answer 1

The correct answer is B. In set B, the input of -2 does not correspond to exactly one output.