Final answer:
The equation representing a population increase is 'Birth + Immigration > Death + Emigration', reflecting that population growth occurs when the combined rates of births and immigration exceed the rates of deaths and emigration.
Step-by-step explanation:
The equation that represents a population that is increasing is Birth + Immigration > Death + Emigration. This is because population growth depends on the rates of birth and immigration (which add individuals to the population) being greater than the rates of death and emigration (which remove individuals from the population).
When a population has an unlimited supply of resources, it can experience exponential growth, leading to a rapid increase in population size. However, in reality, factors like food availability, predation, disease, and competition can limit growth and cause it to stabilize.
In demographic studies, the population growth rate can be predicted by a simple equation: growth rate = birth rate – death rate, modified to include migration. This can reflect the changes in the demographic transition model for a given country.