This model represents the dynamics of the human population in Vancouver, taking into account births, deaths, immigration, and emigration. Population growth depends on density-dependent birth and death rates. When the population is below its carrying capacity, the birth rate is greater than the death rate, causing the population to grow. When the population reaches carrying capacity, the birth and death rates are equal. If the population exceeds carrying capacity, the death rate becomes greater than the birth rate, causing the population to decrease. Immigration adds people to the population, while emigration removes people from the population.
