Banks The table gives the number of banks in the United States for selected years from 1935 to 2009.
a. Create a scatter plot of the data, with x equal to the number of years after 1900.
b. Find a quadratic function that models the data.
c. Use the model to estimate the number of banks in 2007.
d. In what years does the model estimate that the number of banks in the U.S. equals 5818?
Year | Number of Banks |
1935 | 15,295 |
1940 | 15,772 |
1950 | 16,500 |
1960 | 17,549 |
1970 | 18,205 |
1980 | 18,763 |
1990 | 15,158 |
2000 | 9905 |
2009 | 8185 |
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