Question

Please help me out, thank you

Answer 1

A. Not a function

B. function

C. function

D. not a function

Explanation:

A is not a function because it has more than one of the same input ( x value)

B is a function because it does NOT have more than one of the same input (x value)

C is a function because it does NOT have more than one of the same input (x value)

D is not a function because it has more than one of the same input ( x value)

Hope this helps.