HI, I'M HAVING A LITTLE DIFFICULTY WITH THIS GROUP OF QUESTIONS. MY TEACHER IS NOT THE BEST AT EXPLAINING SO CAN YOU EXAMPLE/EXPALIN HOW TO DO THESE PROBLEMS SO I CAN COMPLETE THEM. THESE QUESTIONS ARE BASED ON REGRESSION.

1...|... '""'-'2"'I"'3"'I'"4"'l"'5"'|"'5"'+"'7"'| Z. The Great Plains Railroad is interested in studying how fuel consumption is related to the number of railcars for its trains on a certain route between Oklahoma City and Omaha. A random sample of 10 trains on this route has yielded the data in the table below. \"III-\"ml Fuel Consumption 58 52 91 80 114 98 87 122 100 70 (Units/mile) a. Is a linear model appropriate for modelling these data? Clearly explain your reasoning using the correlation coefficient, r. b. What is the coefficient of determination, r1, ? Interpret the value in context c. Find the Least Squares Regression equation for the data in the table and interpret its slope and yintercept in context. d. Suppose the fuel consumption costs $25 per unit. Give a single estimate for the change in the average cost of fuel per mile for each additional railcar attached to a train. Show your work