(Requires Calculus) in the Equation $\widehat { \text { TestScore } } = 607.3 + 3.85 \text { Income } - 0.0423 \text { Income } { } ^ { 2 }$

question 11

Multiple Choice

(Requires Calculus) In the equation $\widehat { \text { TestScore } } = 607.3 + 3.85 \text { Income } - 0.0423 \text { Income } { } ^ { 2 }$
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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