Number of people who completed program 13 500 12 000 10 500 9 000 7 500 6 000 4 500 3 000 1 500 y y f x t 0 0 1 2 3 4 5 6789 Years after 2008 A 2008 to 2009 B 2010 to 2011 C 2013 to 2014 D 2016 to 2017 A 8 The graph of the exponential function f shown models the number of people who completed the United Services Military Apprenticeship Program in a given year over a 10 year period According to the model between which two years did the number of people completing the program increase the most