2. There were 42 grizzly bears in a provincial park in 1980. There were 30 grizzly
bears in the same provincial park in 1990. What is the rate of change per year of
grizzly bears in this time period?
A. -12 grizzly bears/year
B. -1.2 grizzly bears/year
C. 1.2 grizzly bears/year
D. 12 grizzly bears/year
