On January 4, 1980 the price of a widget was $97.51. On January 4, 1994 the price of a widget was $6.29. Find the average rate of change in the price of a widget from 1980 to 1994. Round to the nearest cent.

The average rate of change is LaTeX:  \displaystyle \frac{6.29-97.51}{1994-1980}= -6.52 dollars per year.