3. Arnold Tofu owns and operates a chain of 12 vegetable protein “hamburger” restaurants in northern Louisiana. Sales figures and profits for the stores are in the table below. Sales are given in millions of dollars; profits are in hundreds of thousands of dollars. Calculate a regression line for the data. What is your forecast of profit for a store with sales of $24 million? $30 million?
. Store . Profits . Sales
. 1 . 14 . 6
. 2 . 11 . 3
. 3 . 15 . 5
. 4 . 16 . 5
. 5 . 24 . 15
. 6 . 28 . 18
. 7 . 22 . 17
. 8 . 21 . 12
. 9 . 26 . 15
. 10 . 43 . 20
. 11 . 34 . 14
. 12 . 9 . 5
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