$\backslash$table$[[$January$,41],[$February$,46],[$March$,57],[$April$,52],[$May$,59],[$June$,51],[$July$,60],[$August$,62]]$

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$.$

b$.$ Use the model to forecast demand for September, October, and November. Here, $x=9,10,$ and $11,$ respectively.