1. The problem statement, all variables and given/known data Find the gradient of the function at the given point, then sketch the gradient together with the level curve that passes through the point. f(x,y) = y - x (2,1) 2. Relevant equations gradient of f = (df/dx)i + (df/dy)j 3. The attempt at a solution df/dx = -1 df/dy = 1 gradient of f = (df/dx)i + (df/dy)j = -i + j I don't really know where to go from here; what exactly is a level curve?