What is the coordinate for y equals 1?

Answer 1

I suspect that you want to graph the relation y = 1.

If this is the case then notice that nothing is being said about x; x can assume any value. Another way of saying this is that, no matter what value x assumes, y = 1. We can make a table :

x y

-2 1

-1 1

0 1

1 1

2 1

I would say, try plotting these co-ordinates and see what you get. You can also speculate about other values of x and y.