If you subtract the death rate from the birth rate of a population, you will calculate what?

a. the arithmetic growth rate.
b. the expansion rate.
c. the carrying capacity.
d. the intrinsic growth rate.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

you can use a^2+ b^2=c^2