Question: Without doing any computation, predict the average value of f(x, y) = x + y over the rectangle R = {(x, y) | -10

Without doing any computation, predict the average value of f(x, y) = x + y over the rectangle R = {(x, y) | -10 ≤ x ≤ 10, -10 ≤ y ≤ 10}. Then check the correctness of your prediction by evaluating a double integral.

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