Suppose that f(x, y) is a smooth function and that its partial derivatives have the values, fz(5,8) = 2 and fy(5, 8) = -4. Given that f(5, 8) = 6, use this information to estimate the value of f(6,9). Note this is analogous to finding the tangent line approximation to a function of one variable. In fancy terms, it is the first Taylor approximation. Estimate of (integer value) f(5,9) Estimate of (integer value) f(6,8) Estimate of (integer value) f(6,9) B

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