The percentages of American adults whose favorite sport is racing are shown in Table 18 for various years.

Let p be the percentage of American adults whose favorite sport is racing at t years since 2000.
a. Construct a scatterplot.
b. Describe the four characteristics of the association. Compute and interpret r as part of your analysis.
c. Find an equation of a linear model.
d. Find the p-intercept. What does it mean in this situation? Do you have much faith in your estimate? Explain.
e. What is the slope? What does it mean in this situation?

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Table 18 Percentages of American Adults Whose Favorite Sport is Racing Year Percent 2005 2006 2007 2008 2009 2010 2011 2012 2013 6.1 5.7 5.4 5.0 4.7 3.5 3.5 3.7