Use this graph of the idealized exponential and logistic growth c...

Question

Use this graph of the idealized exponential and logistic growth curves to complete the following. a. Label the axes and curves on the graph. b. Give the formula that describes the blue curve. c. What does the dotted line represent? d. For each curve, indicate and explain where population growth is the most rapid. e. Which of these curves best represents global human population growth?

Accepted Answer

Hello everyone and welcome to today's video today. We have that the population growth is zero. When and so we're giving certain scenarios that would yield a population growth of zero. Well, when we talk about population growth, what are we really talking about? We're not just talking about growth per se, but just changes to the number of people in this population. This is usually going to be through births. And that's well, let's go over each of our answer choices so that we can analyze or identify the one that will yield a population growth of zero. Let's begin by answer choice. A We have that the birth rate is zero. If we have a birth rate of zero, then we're going to have a mortality rate that is higher than that. So there's going to be more people dying that more people being born because of these or population growth will be negative or the number of people will be decreasing. This is not what we're looking for. It is not zero. So we're going to cancel it out. Then we have the mortality rate is zero. This is going to be the same scenario. But backwards here we have more people being born than dying. So we're going to have a population growth that is positive or just more than zero. This is not zero again. So we're going to cancel it out as well. If we have the immigration and immigration rates both being zero, then that means that there is no change to the population growth. However, we could still have births and deaths occurring at different rates which could affect this population growth. Because of this, we're going to cancel this out as well. And so we're left with answer choice, the birth and mortality rates are equal. So if we have the same number of births then mortalities and we subtract them and then their numbers are equal, we're going to achieve a population growth of zero because if we subtract a number by its same number, this is going to yield zero. So if we have the same people being born as they're dying, the population growth or the number of people in that population will remain equal, be making it zero because of this answer choice. C is the correct answer to this question. I really hope this video helped you and I hope to see you on the next one.

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