Solve the problem.
-In 1980 , there were 138,000 farms in a state. As of 2005 , there were 78,000 . Find the average rate of change in the number of farms per year.
A) 2400 farms per yr
B) 8640 farms per yr
C) -6400 farms per yr
D) -2400 farms per yr

Question

Quizplus · Accepted Answer

The average rate of change is found by dividing the change in the number of farms by the number of years. From 1980 to 2005 is 25 years. The change in farms is 78,000 - 138,000 = -60,000 farms. So, the average rate of change is -60,000 farms / 25 years = -2400 farms per year.

Solve the Problem. -In 1980 , There Were 138,000 Farms in a State