According to the U.S. Census, the percent of U.S. schoolchildren aged 5 to 17 who speak another language at home is given in the following table.
Year | Percent |
1979 | 8.5 |
1989 | 12.6 |
1992 | 14.2 |
1995 | 14.1 |
1999 | 16.7 |
a. Find a linear regression model to fit the data. Let x represent the number of years after 1970.
b. Use the model from part a to estimate the percent of U.S. schoolchildren in 1994 who spoke another language at home.
c. Use the model from part a to predict the percent of U.S. schoolchildren in 2010 who speak another language at home.
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