Donald has a passion for lm and enjoys collecting DVDs, but he is also a student and has to watch his budget. So the amount he spends on them each month depends on how much he earns at his parttime job. Donald believes that the relationship between his income and the amount he spends on DVDs can be expressed as a straight line. Answer the subquestions using the following notations. YXEl/jl (a) Assuming Y is Donald's income and X is his DVD expenditures. Write down a regression equation describing the relationship stated in the question (b) Is the choice of notations (X and Y) in question (a) good or bad? Why? (c) Explain the difference between (i) {31 and 61 (d) Think of something you do in your everyday life that you would like to estimate using a regression model. (Make sure it is different from the examples given in the class.) What are your dependent variable and independent variable(s)? (If more than one independent variable seems important, that's ne). Write down your own regression equation with dening the variables