The teenage birthrate in the United States has declined since 1990 (see Table 26).

Let B be the American teenage birthrate (number of births per 1000 women ages 15€“19) at t years since 1990.
a. Construct a scatterplot.
b. Describe the four characteristics of the association. Compute and interpret r as part of your analysis.
c. Graph the model B = -1.44t + 61.67 on the scatterplot. Does it come close to the data points?
d. Estimate the teenage birthrate in 2012. Then estimate the number of births to women ages 15€“19 in 2012. Use the U.S. Census Bureau€™s estimate that there were 10,526,000 women ages 15€“19 in that year.
e. In which years were there fewer than 50 births per 1000 women ages 15€“19?

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Table 26 American Teenage Birthrate Birthrate (number of births per 1000 women ages 15-19) Year 1990 1995 2000 2005 2010 2013 599 56.0 47.7 40.5 34.3 26.5