Average monthly temperatu
Use the equation of the line of best fit, y=-1.23x+97.30, to answer the questions below.
Give exact answers, not rounded approximations.
(a) What is the predicted heating cost for a month with an
average temperature of 0 °F?
(b) For an increase of one degree Fahrenheit, what is the
predicted decrease in the monthly heating cost?
(c) What is the predicted heating cost for a month with an
average temperature of 45 °F?