The following data represents total CO2 emissions per vehicle (in Metric tons per vehicle) [corporate.ford.com/microsites/sustainability-report- 2012-13/environment-data-energy].

(a) Find the least-squares line appropriate for these data.
(b) Plot the points and graph the line.
(c) Calculate the 95% confidence intervals for β0 and β1, respectively.

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Year Total 2011 0.91 2007 2008 1.09 2009 1.07 2010 1.01 2012 0.90 1.01