Which of the following is not a function:

A) 2y^2 - 5
B) y = 2sqrt(x)
C) y = 2x^2 - 5

I think it is A but i am not sure. Can anyone tell me if it is?

Question

Which of the following is not a function:

A) 2y^2 - 5
B) y = 2sqrt(x)
C) y = 2x^2 - 5

I think it is A but i am not sure. Can anyone tell me if it is?

babyslapmafro · Answer

A

babyslapmafro · Answer

A is not a relation of two inputs, i.e. (y and x)

anonymous · Answer

Thank you!

babyslapmafro · Answer

no prob

anonymous · Answer

one more thing. would (-1,-6) (4,-6)(-3,-6) be a function? From what I understand if there are any x values that are the same it cant possibly be a function..but what about y?

babyslapmafro · Answer

I don't understand that question, can you phrase it exactly how it is in the book or online program your are getting the question from?

anonymous · Answer

Which of the following is a function: A) (-1,-6) (4,-6)(-3,-6) B) x = y^2 C) X^2 + y^2 = 1

babyslapmafro · Answer

Tricky question, A could represent a function since there are no x-values given with a similar y-value.  Also, B is  a function since x=y^2 is the same as y=sqrt(x). And C could be a function given similar rules as seen in answer B.

babyslapmafro · Answer

I would really have to focus on the strict definition of a function to help you answer this multiple choice question, what I have given is all I know at this time, so I won't be able to help much.

anonymous · Answer

alright well thanks!