Fireworks Revenue. The fireworks industry in the United States had a revenue of $945 milli...

Fireworks Revenue. The fireworks industry in the United States had a revenue of $945 million in 2009. This figure had increased from approximately $425 million in 1998. (Source: American Pyrotechnics Association) Find the average rate of change in the U.S. fireworks industry revenue from 1998 to 2009.