**r:** intrinsic rate of natural increase (Malthusian parameter)

• **r > 0**: population growth

• **r = 0**: no growth

How do changing values for *r* affect the growth rate of a population?

a) Populations grow when *r* is negative, remain constant when *r* is positive, and shrink when *r* is zero.

b) Populations grow when *r* is negative, remain constant when *r* is zero, and shrink when *r* is positive.

c) Populations grow when *r* is positive, remain constant when *r* is negative, and shrink when *r* is zero.

d) Populations grow when *r* is positive, remain constant when *r* is zero, and shrink when *r* is negative.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Population Ecology concept. You can view video lessons to learn Population Ecology. Or if you need more Population Ecology practice, you can also practice Population Ecology practice problems.