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Social Science The following table shows the percentage of U.S. students who carried a weapon to school in various years†:
Year | Percentage |
1993 | 22.1 |
1995 | 20.0 |
1997 | 18.3 |
1999 | 17.3 |
2001 | 17.4 |
2003 | 17.1 |
2005 | 18.5 |
(a) Sketch a scatter plot for this data, with x = 3 corresponding to 1993.
(b) Use quadratic regression to find a function g that models this data.
(c) Assuming the trend continues, estimate the percentage of students carrying a weapon school in 2009.
†The U.S. Department of Justice.
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