Question

Which of the following relations is NOT a function?


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


B. (-8,4), (2, 3), (-5, 1), (5, 2)


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


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

Answer 1

Something is a function if you can always answer the question "For a given X, what's the value of Y"?

(1, 2) (3, 2) --> What's the value if x=1? It's 2. What's the value if x=3? It's 2. Since you can always answer the question, it's a function.

(1, 8) (1, 9) --> What's the value if x=1? You don't know. it could be either 8 or 9. Therefore it's not a function.

Answer 2

You are funny haha, seriously everyone here is lazy as hell and you are going after a working person thats unfair haha

Answer 3

You seem like one of the lazy people, you just keep posting identical questions that would be really easy if you spent 3 minutes learning how to solve it

Answer 4

ive had my butt on this chair for the past 3 hours, not into wasting my time to be honest...

Answer 5

Did the rule I posted above make sense to you?