Calculus Help! Determine the sign of fx and fy at each indicated point using the contour diagram of f shown below. (The point P is that in the first quadrant, at a positive x and y value; Q through T are located clockwise from P, so that Q is at a positive x value and negative y, etc.)

Question

anonymous · Answer

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anonymous · Answer

a).At point Q,R,S,determine whether fx and fy is postive/negative.

ash2326 · Answer

at P
Ist quadrant
fx and fy positive
at Q
4th quadrant
Fx=+
Fy=-
at R
3rd quadrant
Fx=-
Fy=-

at S 
4th  Quadrant
Fx=-
Fy=+

anonymous · Answer

I tried that and it has a least one wrong which i don't know which one!!