Question: 2. The following data represents sales for 2005 to 2015: Year Sales 2005 10.000 2006 11.000 2007 12.000 2008 12.500 2009 16.000 2010 18.000 2011

2. The following data represents sales for 2005 to 2015:

Year Sales

2005 10.000

2006 11.000

2007 12.000

2008 12.500

2009 16.000

2010 18.000

2011 25.000

2012 40.000

2013 41.000

2014 43.000

2015 50.000

Based on the data,

(a) Plot the data on a graph.

(b) Draw the secular trend line of best fit using semi-average method.

(c) Predict sales for 2019.

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