Understanding Exponential Growth and Decay

Which of the following equations represents exponential growth?

• 5

• 3

• 15

Which of the following represents exponential decay?

If a population of bacteria doubles every hour, which of the following equations models this situation?

• 0.75

• 4

• 3

Which of the following functions shows a decay factor of 0.8?

• 0.5

• 1.5

• 0.15

• 0.05

• 25%

• 12.5%

• 2.5%

• 1.25%