Question

7. Which set of ordered pairs represents a function?

A) {(-2,1),(-1,0). (1,-1), (2,-2), (3,-3)}

B) {(-2,57, (-2,5), (-2,7),(-2,9), (-2,11)}

C) {(1,5), 7,2), (9,1), (9,7), (2,7)}

D) {(-4,0), (-2,1),(0,2), (-2,4), (-4,6)}

Answer 1

a

Explanation:

to be a function, every x has to have exactly one y, so there can't be the same number x twice wirh different y's