in 2008, about 16,000 hybrid cars were sold. in 2009, about 20,000 hybrids were sold. what is the rate of change in the number of hybrids sold per year from 2008-2009

There's a change in 4,000 cars per year.

Step-by-step explanation:

To find the rate of change, use the equation below.

Change in amount/Change in time = rate

(20,000 - 16,000) / (2009 - 2008) = rate

4,000/1 = rate

4,000 cars per year.