Question

Check this please.

Answer 1

http://prntscr.com/6zb3ov

Answer 2

Answer. http://prntscr.com/6zb3ye

Answer 3

@triciaal

Answer 4

I did not go through the details but yes it is one to one
for any value of x there is one value for y

Answer 5

So it's correct?

Answer 6

I would use different values of x and find the corresponding value for y