Travel and Tourism Spending Global spending on travel and tourism (in billions of dollars) for the years 1991–2009 is given in the table.
a. Write the equation of a power function that models the data, letting your input represent the number of years after 1990.
b. Find the best-fitting quadratic model for the data, with x = 0 in 1990.
c. Compare the two models by graphing each model on the same axes as the data points. Which model appears to be the best fit?
Year | Spending (billions of $) | Year | Spending (billions of $) |
1991 | 278 | 2001 | 472 |
1992 | 317 | 2002 | 487 |
1993 | 323 | 2003 | 533 |
1994 | 356 | 2004 | 634 |
1995 | 413 | 2005 | 679 |
1996 | 439 | 2006 | 744 |
1997 | 443 | 2007 | 859 |
1998 | 445 | 2008 | 942 |
1999 | 455 | 2009 | 852 |
2000 | 483 |
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