(Requires Calculus)In the equation $\widehat{\text { TestScore }}$ = 607.3 + 3.85 Income - 0.0423Income², the following income level results in the maximum test score A)607.3. B)91.02. C)45.50. D)cannot be determined without a plot of the data.

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The Answer is C

(Requires Calculus)In the Equation TestScore ^\widehat{\text { TestScore }} TestScore = 6073 + 3

(Requires Calculus)In the Equation $\widehat{\text { TestScore }}$ = 6073 + 3