The following data show the price in dollars for a general admission ticket to the Magic Kingdom at Disney World from the year 2000 (period 1) to 2017 (period 18) (Travel 1 Leisure website). These data are in the file DisneyPrices. 

a. Construct a time-series plot. What type of pattern exists? 

b. Develop an appropriate trend equation. Explain your choice of trend equation.

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Year Period Price of Admission ($) 2000 1 $46.00 2001 $48.00 2002 3 $50.00 2003 4 $52.00 2004 $54.75 2005 6 $59.75 2006 7 $67.00 2007 8 $71.00 2008 9 $75.00 2009 10 $79.00 2010 11 $82.00 2011 12 $85.00 2012 13 $89.00 2013 14 $95.00 2014 15 $99.00 2015 16 $106.00 2016 17 $110.00 2017 18 $115.00