The annual sales of passenger vehicles in China are shown in Table 51 for various years.

Let s be the annual passenger vehicle sales (in millions) in China at t years since 2000.
a. Use technology to construct a scatterplot.
b. Use technology to graph the model s = 1.86t - 8.26 on the scatterplot. Does it come close to the data points?
c. Rewrite the equation s = 1.86t - 8.26 using the function name f.
d. Find f(14). What does it mean in this situation? Did you perform interpolation or extrapolation? Do you have much faith in your prediction?
e. On the basis of your result in part (d), what was the in- crease in sales from 2013 to 2014? What percentage in- crease is that? Compare your result with consulting firm IHS€™s prediction of 10%.

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Table 51 Annual Sales of Passenger Vehicles in China Passenger Vehicle Sales (millions) 5.3 5.7 8.3 1.3 12.2 3.3 16.3 Year 2007 2008 2009 2010 2011 2012 2013