On January 4, 1953 the price of a widget was $17.62. On January 4, 1993 the price of a widget was $15.09. Find the average rate of change in the price of a widget from 1953 to 1993. Round to the nearest cent.

The average rate of change is LaTeX:  \displaystyle \frac{15.09-17.62}{1993-1953}= -0.06 dollars per year.