Scattergraph and high-low method - 17 minutes Frost's Ice Cream Shop has the following cost data related to the company's maintenance costs: Number of customers Maintenance cost July 675 $5,000 August 800 5,600 September 725 5,200 October 650 4,900 November 500 4,700 December 575 4,800 Required: a) Prepare a scattergraph based on the above information b) Based on the scattergraph prepared in Part A, estimate the cost formula (write in y=mx+b format) c) Using the high-low method, estimate the cost formula (write in y=mx+b format)