According to the census data for Lake County, Ohio:
[table — see PDF]
(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 Lake County in 2010. (The recorded figure from the 2010 census is 230,041)
(c) Use the regression line to predict when the population of Lake County will reach 250,000.