The table provides data on the average tuition and fees charged to instate students by public fouryear colleges and universities for the 1980 to 2015 academic years. Because almost any variable measured in dollars increases over time due to inflation (the falling buying power of a dollar), the values are given in "constant dollars," adjusted to have the same buying power that a dollar had in 2015.

Year	Tuition	Year	Tuition	Year	Tuition
1980	$2323	1992	$3971	2004	$6459
1981	$2371	1993	$4197	2005	$6708
1982	$2529	1994	$4359	2006	$6807
1983	$2747	1995	$4408	2007	$7093
1984	$2821	1996	$4430	2008	$7160
1985	$2923	1997	$4634	2009	$7838
1986	$3088	1998	$4757	2010	$8351
1987	$3120	1999	$4821	2011	$8742
1988	$3184	2000	$4854	2012	$9006
1989	$3260	2001	$5074	2013	$9077
1990	$3498	2002	$5440	2014	$9161
1991	$3700	2003	$6028	2015	$9410

1. (a) and (b) Make a timeplot of average tuition and fees. What overall pattern does the plot have?

A. upward trend

B. downward trend

C. none of the above

D. strong periodic variations

2. Some possible deviations from the overall pattern are outliers: periods when charges decreased (in 2015 dollars) and periods of particularly rapid increase. Which are present in the plot, and during which years? Match each time period to the correct description.

*Place each answer of the 'answer bank' in the correct category*

Answer Bank: Answer Bank

2008-2012, 1980-1985, 2012-2013, 1995-2000, 1986-1990, 2000-2005