On January 4, 1950 the price of a stembolt was $36.92. On January 4, 1984 the price of a stembolt was $63.64. Find the average rate of change in the price of a stembolt from 1950 to 1984. Round to the nearest cent.

The average rate of change is LaTeX:  \displaystyle \frac{63.64-36.92}{1984-1950}= 0.79 dollars per year.