Question

Which sets of ordered pairs designate a function?

A) (2,3), (3,4), (4,5), (5,6).
B) (1,1), (-1,1), (2,4), (-2,4).
C) (0,0), (4,2), (4,-2), (5,5).
D) (0,4), (1,4), (2,4), (3,4)

Answer 1

A because you can’t put in something and get two answers and you can’t get two answers with the same thing