Method of Least Squares, Goodness of Fit Denpa Dalal opened a free-standing radiology clinic. She had anticipated that the costs for the radiological tests would be primarily fixed, but she found that costs increased with the number of tests performed. Costs for this service over the past nine months are as follows: Month January February March April May June July August September Radiology Tests 2,800 2,600 3,100 3,500 3,400 3,700 3,840 4.100 3.450 Total Cost $133,500 135,060 175.000 170,600 176,900 186,600 174,450 195,510 185,300 Required: 1. Compute the cost formula for radiology services using the method of least squares. If required, round your answers to two decimal places. Yos X 2. Using the formula computed in Requirement 1, what is the predicted cost of radiology services for October for 3,500 appointments? (Round the answer to the nearest dollar)