Question

Clarified.

Answer 1

You have a function y(x)=2x+2.

Is y the input or output? Is x the input or output?

Answer 2

Yes. So to find an output you need an input. So if you input (x) into the equation, you should get an output.

Answer 3

Yeah, so you'll create a table. You'll input one input (1, for example), and figure out what the output is for that input. Then you'll repeat for the rest of the inputs.

Answer 4

That's right.

Answer 5

Yep, that's exactly how you do it.

Answer 6

Close. For the domain (1,2,3), the range would be (4,6,8).