6) A small manufacturing firm collected the following data on advertising expenditures (in thousands 6) of dollars) and total revenue (in thousands of dollars). Find the quadratic function of best fit. Round values to the nearest thousandth. Advertising, x | Total Revenue, R 25 28 31 32 34 39 40 45 6430 6432 6434 6434 6434 6431 6432 6420 A) R(x) = -0.0242x2 + 7.139x + 6209.323 C) R(x) = -0.091x2 + 5.952x+6337.167 B) R(x) = -0.310x2 + 2.631x + 6128.455 D) R(x) = -0.015x2 + 4.536x + 6123.841

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