On January 4, 1965 the price of a stembolt was $50.94. On January 4, 1992 the price of a stembolt was $58.70. Find the average rate of change in the price of a stembolt from 1965 to 1992. Round to the nearest cent.

The average rate of change is LaTeX:  \displaystyle \frac{58.70-50.94}{1992-1965}= 0.29 dollars per year.