Question: Values of f(x, y) are in Table 8.8. Assuming they exist, decide whether you expect the following partial derivatives to be positive or negative. (a)

Values of f(x, y) are in Table 8.8. Assuming they exist, decide whether you expect the following partial derivatives to be positive or negative.
(a) f_x(−2, −1)

(b) f_y(2, 1)

(d) f_y(0, 3)

$Table 8.8 x \ y -2 0 2 4 -1 1 7$

Table 8.8 x \ y -2 0 2 4 -1 1 7 3 8 5 3 2 1 3 2 10 7 5 4 13 10 8 7 5

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