Question

Which of the following relations is a function? A.{(0,2),(1,2),(2,2),(3,2)} B.{(2,0),(2,1),(2,2),(2,3)} C.{(3,5) ,(4,7),(5,9),(5,11)} D. {(4,5),(6,7),(8,9),(8,11)}

Answer 1

A

Explanation:

The x values have to be different in order for points not to be on the same vertical line. A function needs to pass the vertical line test.