Teen Birth Rate The birth rate in 2009 for U.S. girls ages 15 to 19 was the lowest since the government began tracking the statistic in 1940. The highest birth rate for U.S. teens was 96.3 per 1000 girls in 1957. In 2009, the birth rate was lowest at 39.1.
a. What is the slope of the line joining the points (7, 96.3) and (59, 39.1)?
b. What is the average rate of change in the birth rate over this period?
c. What does this average rate of change tell about the birth rate?
d. Use the slope from part (a) and the birth rate from 2009 to write the equation of the line. Let x represent the number of years after 1950.
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