In Exercises 46 49: (a) Use the method described in
Chapter 4, Problem 46(choose chapter or problem)
In Exercises 46 49: (a) Use the method described in Exercise 45 to find the equation of the regression line for the given data set. (b) For Exercises 48 and 49, if your graphing utility has a feature for computing regression lines, use it to check your answer in part (a).
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