Kelly Services Sales A graph of a model for the sales of services between 2004 and 2...

Kelly Services Sales A graph of a model for the sales of services between 2004 and 2008 by Kelly Services, Inc., a leading global provider of staffing services, is shown below.

a. Use the graph to calculate the average rate of change in Kelly’s sales of services between 2004 and 2007. Interpret the result.

b. Calculate the percentage change in Kelly’s sales between 2007 and 2008. Interpret the result.

c. Calculate the change in Kelly’s sales between 2004 and 2008.