The sales of a company (in million dollors) for each year are shown in the table below. X (Year) | 2005 | 2006| 2007| 2008 2009 Y (Sales) 12 19 29 37 45 a) Find the least square regression line y = ax + b. b) Use the least square regression line as a model to estimate the sales of the company in 2012.

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