Use the equation of the line of best fit, y = 3.97x + 15.52 to answer the questions below.
Give exact answers, not rounded approximations.

(a) What is the predicted midterm score for a student who doesn't spend any time studying?

(b) For an increase of one hour in the time spent studying, what is the predicted increase in the midterm score?

(c) What is the predicted midterm score for a student who studies for 12 hours?