I have looked at the graph. As far as I know, radial is when all of the vectors are pointing away from the orgin, which they are. How can I prove if a function is radial (not just look at a graph). I would like a formula, not an example. Even if my function is not radial, I would still like to know computations to prove if a vector field is radial or not.
My function F(x-y, y+x) For a graphing site: http://kevinmehall.net/p/equationexplorer/vectorfield