Question

Which set of points represents a function?

A. (1, 4), (–1, 4), (4, 7), (–4, 2), (3, 6)

B. (–1, 4), (–1, 2), (4, 7), (–1, 2), (3, 6)

C. (1, –4), (–1, 2), (4, –7), (3, 2), (3, –4)

D. (1, 4), (–1, 2), (4, 7), (–1, 3), (3, 4)

Answer 1

A is the answer because it does not repeat any of the x numbers