# What is B in the logistic growth model?

Table of Contents

## What is B in the logistic growth model?

c is the carrying capacity, or limiting value. b is a constant determined by the rate of growth.

## Is logistic growth on AP Calc AB?

This is a topic tested on the AP Calculus BC exam (and not on AB). Here is a brief outline of this topic.

What is A and B in logistic function?

As you can see, the formula has two parameters, A and B. Changing these parameters affects the exact shape of the logistic function. The parameter A affects how steeply the function rises as it passes through its midpoint (p = 0.5), while the parameter B determines at which duration the midpoint occurs.

What is the differential equation for logistic growth?

The logistic differential equation dN/dt=rN(1-N/K) describes the situation where a population grows proportionally to its size, but stops growing when it reaches the size of K.

### What is K in logistic growth?

k = relative growth rate coefficient K = carrying capacity, the amount that when exceeded will result in the population decreasing.

### What is the difference between dN dt and R?

In these models, dN/dt changes over time (depends on t), but r stays the same (does not depend on t). Also, r is a per capita growth rate, meaning that it’s measured per individual, whereas dN/dt is measured for the overall population.

What does R stand for in logistic growth?

When the per capita rate of increase ( r) decreases as the population increases towards a maximum limit, then we get logistic growth.

What does N stand for in population growth?

Population growth rate is measured in number of individuals in a population (N) over time (t).

## What are the 2 types of population growth?

Two types of population growth patterns may occur depending on specific environmental conditions:

• An exponential growth pattern (J curve) occurs in an ideal, unlimited environment.
• A logistic growth pattern (S curve) occurs when environmental pressures slow the rate of growth.

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