School Enrollment The function E gives the public secondary school enrollment, in millions of students, in the United States between 1940 and 2008. The input x represents the number of years since 1940. Use the following information to sketch a graph of E.
(Sources: Based on data appearing in Datapedia of the United States, Lanham, MD: Bernan Press, 1994; and in Statistical Abstract, 1998 and 2009)
• E(40) = 13.2
• The graph of E is always concave down.
• Between 1980 and 1990, enrollment declined at an average rate of 0.19 million students per year.
• The projected enrollment for 2008 is 14,400,000 students.
• It is not possible to draw a line tangent to the graph of E at x = 50.
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