In a certain railroad, crews are transported to the job site each day to work. It is of interest to find a way to predict the cycle time (the time to leave the hub, take the crew to the worksite, and return to the hub) so that the people managing the transportation activities can plan the work for the day. Historical data for one type of trip is available and the following scatter plot of the cycle time versus the mileage (total miles traveled in the trip) is plotted