Which of the following relations is a function?

A. (2,4), (-5, 6), (2, 3), (-8, 2)

B. (2,4), (-5, 2), (5, 1), (-8, 2)

C. (2,0), (-5, 3), (5, 1), (-5, 5)

D. (5,1), (-5, 4), (2, 1), (5, 2)

Question

Which of the following relations is a function?

A. 	(2,4), (-5, 6), (2, 3), (-8, 2)

B. 	(2,4), (-5, 2), (5, 1), (-8, 2)

C. 	(2,0), (-5, 3), (5, 1), (-5, 5)

D. 	(5,1), (-5, 4), (2, 1), (5, 2)

mathmate · Answer

Follow the same rule (duplicate x cannot have different y-values) and you'll spot it in no time.

anonymous · Answer

Can you tell me the answer please im not very sure if im right...

mathmate · Answer

Did you notice that in the second one, all x-values are different? That's your guy.

anonymous · Answer

ooooh!