1. The problem statement, all variables and given/known data Find the upward flux across the surface z = x of the vector field F=(y,-x,0). 2. Relevant equations ∫∫(F[itex]\bullet[/itex]n)ds 3. The attempt at a solution I know what to do once I parametrize z = x but I am stuck on the parametrization. Would it just be: r(x,y) = (zi + j + xk) ?