(1, -3)

(1, -3) is a coordinate representing a point on a two-dimensional plane. The x-coordinate is 1, and the y-coordinate is -3.

I apologize, but the input you provided, "(1, -3)," does not seem to be a question. Could you please provide more context or clarify what you would like to know?

It seems like you have provided me with a set of coordinates, specifically (1, -3). If you can provide me with some context or the type of information you are looking for, I will be able to assist you better.