Answer
a. 274 million; Between 2004 and 2007, Kelly Services sales increased by an average of 274 million per year.
b. -2.957%; Between 2007 and 2008, Kelly's sales of service decreased 2.957%
c. 654 million
Work Step by Step
a. average rate of change is found by using $\frac{new - old}{time}$
in 2004 it was 4860 million in 2007 it was 5682.
$\frac{5682-4860}{3}=274$
b. percent change is found by using $\frac{new-old}{old}*100$%
in 2007 it was 5682 million and in 2008 it was 5514 million
$\frac{5514-5682}{5682}*100$% $ = -2.957%$
c. change is found using $(new- old)$
in 2004 it was 4860 million, in 2008 it was 5514
$(5514-4860)=654$
