Demand for oil changes at Garcia's Garage has been as follows: El Month Number of Oil Changes January 39 February 47 March 66 April 58 May 53 June 52 July 55 August 63 a. Use simple linear regression analysis to develop a forecasting model for monthly demand. In this application, the dependent variable, Y, is monthly demand and the independent variable, X, is the month. For January, let X = 1; for February, let X = 2; and so on. The forecasting model is given by the equation Y = + X. (Enter your responses rounded to two decimal places.)