A hair salon owner collected data comparing the length of an appointment in hours at the salon and the amount of money spent by the customer. Use the graph of the data to answer the questions. 225 Hair Salon 200 175 150 125 100 75 SD Amount of Money Spent (dollars) 25 o 1 2 3 4 Time (hours) Part A: Determine the equation for the line oftit. Show all work and include all steps. (4 points) Part B: Identify and interpret the slope in the context of this scenario. (3 points) Part C: Demonstrate how to use your equation for the line of fit from PartAto predict the cost of a 6-hour hair salon appointment Show all work and include all steps (3 points)