Exponential growth-the J-shaped curve This is probably the best,simple,model of population growth.it predicts the rate of growth,or decay,of any population where the per capita rates of growth and death are constant over time. In exponential growth models,births deaths, emigration and immigration take place continuously This is a good approximation for the growth of most biological populations -i.e.,human populations grow exponentially when resources are plentiful 99 Exponential growth – the J-shaped curve • This is probably the best, simple, model of population growth .it predicts the rate of growth, or decay, of any population where the per capita rates of growth and death are constant over time. – In exponential growth models, births deaths, emigration and immigration take place continuously – This is a good approximation for the growth of most biological populations – i.e., human populations grow exponentially when resources are plentiful