Using the information in Figure 1A.2, calculate the percentage change in Ford’s auto sales from one year to the next. During which year did sales fall at the highest rate?

Figure 1A.2

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Sales 7.0 (millions of automobiles) 6.0 Sales 7.0 (millions of automobiles) 65 6.5 5.0 50 4.0 3.0 2.0 1.0 6.0 5.5 5.0 4.5 0 2005 2007 2009 2011 2013 2015 2005 2007 2009 2011 2013 2015 The slashes (//) indicate that the scale on the vertical axis is truncated, which means that some numbers are omitted. The numbers on the vertical axis jump from 0 to 4.5. (a) Time-series graph where the scale is not truncated (b) Time-series graph with truncated scale