Answer:
Function 1: Not a function
Function 2: Function
Step-by-step explanation:
Functions are relations between two numbers, each ordered pair is associated with only one value from the second set of numbers.
So x can have the same values but y can only be used once per value.
So the first function uses each y twice meaning it is not a function, but function 2 uses each y only once so it is a function.
