Exponential Functions ~ Growth and Decay

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4.

• The life activity of the strain of bacteria shows exponential decay because the base is a number between 0 and 1.
• The life activity of the strain of bacteria shows exponential decay because the base is a number larger than 1.
• The life activity of the strain of bacteria shows exponential growth because the base is a number between 0 and 1.
• The life activity of the strain of bacteria shows exponential growth because the base is a number larger than 1.

5.

• A
• B
• C
• D

6.

• The population of the town is increasing at the rate of 0.6% every year.
• The population of the town is increasing at the rate of 3.6% every year.
• The population of the town is increasing at the rate of 0.036% every year.
• The population of the town is increasing at the rate of 1.036% every year.

7.

• 5%
• 20%
• 80%
• 120%

8.

• The amount of the bacteria decreases by 13% each hour.
• The amount of the bacteria decreases by 87% each hour.
• The amount of the bacteria increases by 13% each hour.
• The amount of the bacteria increases by 87% each hour.

9.

• a = 0, b = 2
• a = 0.2, b = 2
• a = 0.2, b = 0.2
• a = 2, b = 2

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