Skechers U.S.A., Inc., is a performance footwear company headquartered in Manhattan Beach, California. The sales revenue for Skechers over a four-year period are as follows: 

a. Are these cross-sectional or time-series data? 

b. Construct a bar graph similar to Figure 1.2 B. 

c. What can you say about how Skecher’s sales are changing over these four years? 

Year 1                     Sales ($ Billion)
Year 1.......................2.30
Year 2.......................3.15
Year 3.......................3.56
Year 4.......................4.16

Figure 1.2 B

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6. 5 3 1 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Year (B) Net Income for McDonald's Inc. 4) 2. Net Income ($ billions)