On January 4, 1985 the price of a sprocket was $90.20. On January 4, 2009 the price of a sprocket was $35.67. Find the average rate of change in the price of a sprocket from 1985 to 2009. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{35.67-90.20}{2009-1985}= -2.27$ dollars per year.