At the final exam in a statistics class, the professor asks each student to indicate how many hours he or she studied for the exam. After grading the exam, the professor computes the least-squares regression line for predicting the final exam score from the number of hours studied. The equation of the line is ̂y = 50 + 5x.

a. Antoine studied for 6 hours. What do you predict his exam score to be?

b. Emma studied for 3 hours longer than Jeremy did. How much higher do you predict Emma’s score to be?