Question

Help please if your kind enough, who one should I choose ?

Answer 1

No my previous one was wrong. it is not a function because each input does not have a unique output!

Explanation:

Functions always have one unique output for an input

Answer 2

Answer: No, this is not a function because an input has more than one output.

3 only equals 20

4 equals 25

5 only equals 30

4 equals 35

6 only equals 40

This is not a function because 4 equals both 25 and 35.