Answer:
Using the formula:

where
is the initial population
r is the rate in decimal
b = 1+r is the growth factor
t is the time in years.
As per the statement:
the bear population increases at a rate of 2% each year there are 1573 bears this year,
⇒
, r = 2% = 0.02
then;

⇒

Therefore, the growth factor b is, 1.02