Question

Which is a Function and which isn't a Function

Answer 1

1 - A is not a function

2 - B is not a function

3 - A is not a function

X can have only 1 value

for example 2B features x=5 where f(x) = -4 but also 1. That means it's not a function

Answer 2

Answer: I believe that A is the function to this problem

Explanation: