Consider the following proposed determining function for a student's grade on the econometrics final, FinalGradei = 68 + 4 HoursStudiedi - 0.5 Num Other Finalsi2 + Ui, where hours studied is the number of hours studied during finals week by student i, and number of other finals squared is the number of other finals student i has during finals week squared. Derive the formula for the change in a student's final grade with respect to a unit change in the number of other finals the student has in finals week.
A. Final Grade increases by 0.5 × (Num Other Finals).
B. Final Grade decreases by Num Other Finals.
C. Final Grade decreases by 0.5.
D. Final Grade increases by 4.
Answer: B
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