On January 4, 1973 the price of a sprocket was $32.31. On January 4, 2000 the price of a sprocket was $42.88. Find the average rate of change in the price of a sprocket from 1973 to 2000. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{42.88-32.31}{2000-1973}= 0.39$ dollars per year.