For Exercises 13–24, do the following:

  1. Calculate the slope and the intercept of the regression line. Write the regression equation.
  2. Interpret the values for and .

Question 4.121

23. The cost of a repair job and the number of hours spent on the repair.

2 120
3 180
5 230
8 350
10 380

4.2.23

(a) (b) For each increase of 1 hour of labor, the estimated cost of the repairs increases by $32.61. When hours of labor, the estimated cost of the repairs is $69.38.