I have a question,
I saw the problem: "You have a function of two variables and know it's stationary points and you know if they are max, min or saddle points.
At which points is the function decreasing? At which points is it decreasing?
Is it right to say, a function of two variables is increasing towards it's maximum points and decreasing towards it's minimum points, it is decreasing and increasing at it's saddle points?