On January 4, 1968 the price of a sprocket was $32.91. On January 4, 1997 the price of a sprocket was $68.85. Find the average rate of change in the price of a sprocket from 1968 to 1997. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{68.85-32.91}{1997-1968}= 1.24$ dollars per year.