Use the equation of the line of best fit, =y+−0.73x8.53, to answer the questions below. Give exact answers, not rounded approximations. (a) What is the predicted time spent exercising for a student who doesn't spend any time texting? hours (b) What is the predicted time spent exercising for a student who spends 4 hours texting? hours (c) For an increase of one hour in the time spent texting, what is the predicted decrease in the time spent exercising? hours