Question

Which of the following relations represents y as a function of x?

A. {(2,2), (2,3), (2,4), (2,5)}
B. {(0,1), (-7,1), (0,6), (8,1)}
C. {(2,6), (3,6), (5,-2), (3,8)}
D. {(1,2), (2,3), (5,3), (7,9)}​

Answer 1

The correct answer is D

Explanation:

In a function, none of the x values in the set can be repeating. D is the only option that meets this requirement.