If f(x, y) = 9 - 3x2 - y , find f,(-2, 6) and fy(-2, 6) and interpret these numbers as slopes fx(-2, 6) X f,( -2, 6) - X Find the first partial derivatives of the function. f ( x , y ) = xy fx (x, y ) = f( x , y ) = Find the first partial derivatives of the function. w = In(x + 7y + 62) aw aw ay aw az Use implicit differentiation to find az/ax and oz/dy. H x2 + 4y2+ 722 = 8 ax Oz ay