Johnson filtration, inc., provides maintenance service for water filtration systems throughout southern florida. customers contact johnson with requests for maintenance service on their water filtration systems. to estimate the service time and the service cost, johnson's managers want to predict the repair time necessary for each maintenance request. hence, repair time in hours is the dependent variable. repair time is believed to be related to three factors; the number of months since the last maintenance service, the type of repair problem (mechanical or electrical), and the repairperson who performs the repair (donna newton or bob jones). data for a sample of 10 service calls are reported in the following table. click on the datafile logo to reference the data. repair time (h) months since last service type of repair repairperson2.9 2 electrical donna newton3.0 6 mechanical donna newton4.8 8 electrical bob jones1.8 3 mechanical donna newton2.9 2 electrical donna newton4.9 7 electrical bob jones4.2 9 mechanical bob jones4.8 8 mechanical bob jones4.4 4 electrical bob jones4.5 6 electrical donna newtonuse the data to develop the simple linear regression equation to predict repair time given the number of months since the last maintenance service. let x represent the number of months since the last maintenance service. if required, round your answers to four decimal places. for subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (example: -300).