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According to this website, the census data for Lorain County,

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According to this website, the census data for Lorain County, Ohio is: year 1970, 1980, 1990, 2000
population 256843, 274909, 271126, 284664

(a) Find the least squares regression line for these data and comment on the goodness of fit. Interpret the slope of the line of best fit.

(b) Use the regression line to predict the population of Lorain County in 2010. (The recorded figure from the 2010 census is 301,356)

(c) Use the regression line to predict when the population of Lake County will reach 325,000.

 
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