The following pairs of values give X, Narco Medicals advertising expense during a period(in hundreds of dollars),
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The following pairs of values give X, Narco Medical’s advertising expense during a period(in hundreds of dollars), and Y, the number of the company’s sales(in thousands of dollars) for the period:
X 8 9 7 6 5 1
Y 15 11 10 11 8 5
Find the least-squares regression line using the formulas for the slope and the intercept. Also, interpret your estimates of the slope and the intercept.
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