3.14 Grocery Costs These data relating the amount spent on groceries per week and the number of household members are from Example 3.3:

a. Find the best-fitting line for these data.

b. Plot the points and the best-fitting line on the same graph. Does the line summarize the information in the data points?

c. What would you estimate a household of six to spend on groceries per week? Should you use the fitted line to estimate this amount? Why or why not?

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x y 2 2 3 4 1 5 $45.75 $60.19 $68.33 $100.92 $35.86 $130.62