On January 4, 1961 the price of a stembolt was $44.93. On January 4, 1986 the price of a stembolt was $24.11. Find the average rate of change in the price of a stembolt from 1961 to 1986. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{24.11-44.93}{1986-1961}= -0.83$ dollars per year.