use the high low method to estimate a cost function for total monthly drivers ed costs based on number of students

Raymond and Reena are partners in a driver's ed business, providing a much-needed service to want-to-be-drivers in their region. They have been satisfied with the profits their business has generated to date, but they'd like to have more reliable estimates for future costs. Believing that the most certain cost driver for their total costs is number of students served, they gathered the following data for the past year. Your answer is incorrect. Use the high-low method to estimate a cost function for total monthly driver's ed costs based on number of students. Y=$