The function f(x)=1200(0.8)^x represent the possible elk population of a...
If x is the number of years from now, that means the current population is when x=0
Therefore, we plug this into the equation:
f(x) = 1200(0.8)^0 = 1200 elk at the park currently
This equation is in the form
where a represents the initial value and b represents 1 plus the growth rate as a decimal number. In this equation, the number in place of a is 1200; this means the initial value, or current population, is 1200.