Question

How do you graph the line `y=3`?

Answer 1

I tried this:

Explanation:

In this case you can say that regardless of the `x` value you choose the corresponding `y` value will always be equal to `3`, so that you will get points with coordinates:

`("any value",3)`

so when you plot these points you get a straight horizontal line that passes through `y=3` and is parallel to the `x` axis:
graphically:

graph{0*x+3 [-10, 10, -5, 5]}