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Instructions for completing exercise 5 in ma 220, which involves analyzing the relationship between the number of household members and weekly grocery expenditures using a scatter plot and best-fitting line. Six data points are given, and the exercise asks to draw the scatter plot, find the best-fitting line, and discuss the implications of a seventh household's grocery expenditure.
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x 2 2 3 4 1 5
y $46 $60 $68 $101 $36 $
(a) Draw a scatter plot of these six data points.
(b) Find the best-fitting line relating y to x for the data and draw the line with your scatter plot in (a).
(c) Suppose you found that a seventh household with two members spent $120 on groceries. Discuss about it.