After having developed your model, you can save it as the .rda file at your computer and reuse it with a new dataset. Let's say you receive some more data about consumers, and you want to see how many of them you can expect to go for a new car—you can just feed that data into the model you've already developed and get an estimate. For more details on how to do this, you can refer to the Forecasting based on multiple regression recipe in Chapter 11, Forecasting with Tableau.