A statistical program is recommended. The number of users of a certain website (in millions) from 2004 through 2011 follows. Year Period Users (Millions) 2004 2005 2 6 2006 13 2007 59 2008 5 144 2009 6 360 2010 609 201 844 (a) Construct a time series plot. 900 900 900 900 800 800 800 800 700 700 700 700 f Users 600 600 600 600 500 lions of Users 500 500 500 Millions of Users Millions of Users 400 400 400 400 Millions of 300 300 300 300 200 200 200 200 100 100 100 100 0 2 8 10 4 8 10 O 2 8 10 0 8 10 Period OO Period Period Period What type of pattern exists? The time series plot exhibits a downward curvilinear trend. The time series plot exhibits an upward curvilinear trend. The time series plot exhibits an upward linear trend. The time series plot exhibits a downward linear trend. (b) Using Minitab or Excel, develop a quadratic trend equation that can be used to forecast users (in millions). (Round your numerical values to one decimal place.) Submit