Resident Population The U.S. resident population from 15 to 19 years of age is given for selected years in the table below. Write the quadratic function (to three decimal places) that models the 15- to 19-year-old population as a function of years after 1980. Include a description of this population and the unit of measure.
Year | Age 15–19 Population (thousands) | Year | Age 15–19 Population (thousands) |
1980 | 21,168 | 2000 | 20,262 |
1985 | 18,727 | 2002 | 20,366 |
1990 | 17,890 | 2004 | 20,724 |
1995 | 18,152 | 2005 | 21,039 |
1997 | 19,068 |
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