On January 4, 1968 the price of a sprocket was $76.26. On January 4, 1988 the price of a sprocket was $64.78. Find the average rate of change in the price of a sprocket from 1968 to 1988. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{64.78-76.26}{1988-1968}= -0.57$ dollars per year.