Find the average rate of change in the price of gasoline from 2006 to 2008

Year

Cost

2005

$2.31

2006

$2.62

2007

$2.84

2008

$3.30

2009

$2.41

2010

$2.84

2011

$3.58

2012

$3.68

А.

$0.34/year

В.

$0.28/year

C.

$0.32/year

D. $0.35/year