Any point on a 45-degree line is?

Answer 1

Any point on a 45-degree line can be described with the equation:

y = x

Answer 2

has x and y coordinates equal to each other.

any point on a 45 degree line is indeed a very lucky point. if i were a point, i doubt i would ever get to be on a 45 degree line.

and if you were a cannonball, you would want to be on a 45 degree line so you could be shot to the farthest point possible.

Answer 3

as close to the y-axis as it is to the x-axis.

This is one of the possible answers.
And the actual answer that you need depends on the context that you are thinking about.