On January 4, 1955 the price of a sprocket was $38.72. On January 4, 2011 the price of a sprocket was $33.98. Find the average rate of change in the price of a sprocket from 1955 to 2011. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{33.98-38.72}{2011-1955}= -0.08$ dollars per year.