Business Math Lesson 5: Costs and Lines, part 6
Channel: Amy Goldlist
Date: 25/06/2021

Baby Sitters R Us charges a flat booking fee plus an hourly rate.  On a normal workday, I hire a Sitter for 9 hours, and I pay $123.50.  On Saturday night, I usually hire a sitter for 4 hours while I go to the movies, and I pay $66.  

(a) Find a linear equation giving cost in terms of the number of hours.
(b) Describe the slope in the words of the problem.
(c) If I hire a sitter for 6 hours, how much will it cost me?