Representing Exponential Decay

Is this exponential growth or decay?

• Growth

• Decay

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x

• y=30(5000)^x

• y=5000(1.3)^x

• y=5000x^x

Is this exponential growth or decay?

• Growth

• Decay

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth

• Decay

This is an example of.....

• exponential decay

• exponential growth

• constant change

• a linear function

Which represents exponential decay?

• A

• B

• C

• D

The population of Townville is decreasing at a rate of 6% each year. If the starting population was 7,000 what equation represents the current population after x number of years?

Choose the correct graph for the situation in problem #6.

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At a certain point in time, a fossil has 3 picograms of carbon-14. Complete the table with the missing mass of carbon-14 and years

a

b

c

11,460

2.38

1.5

Select ALL the functions that show an exponential decay.