Problem

International Visitors The number of international visitors to the United States for selec...

International Visitors The number of international visitors to the United States for selected years 1986–2010 is given in the table below.

Year	U.S. Visitors (millions)	Year	U.S. Visitors (millions)
1986	26	2000	50.9
1987	29.5	2001	44.9
1988	34.1	2002	41.9
1989	36.6	2003	41.2
1990	39.5	2004	46.1
1991	43	2005	49.4
1992	47.3	2006	51.0
1994	45.5	2007	56.0
1995	44	2008	57.9
1996	46.3	2010	55
1997	48.9

a. Using an input equal to the number of years after 1980, graph the aligned data points and both of the given equations to determine which is the better model for the aligned data.
i.
ii. y = −0.031x2 + 2x + 21
b. If you had to pick one of these models to predict the number of international visitors in the year 2020, which model would be the more reasonable choice?