For the data in Table 7-1:
7-1: Calculate the regression equation for the entire range of data. (5 points)
7-2: Is this a usable regression line? (2 points)
7-3: Develop two other regression lines based on 12 24 30 36 and 46 months of data. (10 points)
7-4: Which line would you use and why? (8 points)
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