I will give brainliest

1. Yes

2. Yes

3. No.

Step-by-step explanation:

1. Only one output y for the same x values

2. Only one output y for the same x values  

3. More than one output y for the same x values  

A function is a relation in which each input has only one output. In the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y

30% Increase

Hope this helps!