Up and running auto shop keeps track of their regular customers' data to see if there is a relationship between the life of a car's engine (y) and the number of times the oil is changed (x). when the data is shown on a scatter plot, the equation for the line of best fit is y = 0.4125x + 0.1576. what is the relationship between 0.4125 and the life of the car's engine? a) 0.4125 shows how much the longevity of the engine increases with each oil change. b) 0.4125 shows the expected longevity with no all changes. c) 0.4125 shows the expected longevity for all engines, with or without oil changes. d) 0.4125 is the expected decrease in longevity for each year without an oil change.