What is the image of (8,-5) after a reflection over the line y = -x?

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Prove that quadrilateral is a rhombus.