Final answer:
The population growth rate equation that includes migrations is r = (b + i) - (d + e), where 'r' is the growth rate, 'b' is birth rate, 'i' is immigration, 'd' is death rate, and 'e' is emigration.
Step-by-step explanation:
The equation to calculate the population growth rate including information on migrations is:
r = (b + i) - (d + e)
In this equation, 'r' represents the population growth rate, 'b' stands for the birth rate, 'i' signifies immigration (the number of individuals entering the population), 'd' indicates the death rate, and 'e' denotes emigration (the number of individuals leaving the population). The birth rate and the death rate are typically expressed on a per capita basis, with the terms 'bN' and 'dN' representing the number of births and deaths per individual in the population, respectively.
Thus, the formula accounts for the natural increase or decrease through births and deaths, as well as the impact of migrations through immigration and emigration.