Exponential Functions Post-Test

• Exponential Growth

• Exponential Decay

• Exponential Growth

• Exponential Decay

• Exponential Growth

• Exponential Decay

• Exponential Growth

• Exponential Decay

Which of the following scenarios is an example of exponential growth?

The music industry has steadily moved from selling music in a physical format such as records, eight tracks, cassettes, and CDs to selling music in digital formats. In 2003, the music industry sold $19.4 billion of music in the physical format. Each year after 2003, the amount of sales of music constantly decreased by 20%.

Select the function Q(t) , where Q represents the sales, in billions of dollars, of music in the physical format and t represents the number of years since 2003.

The graph of an exponential function is shown.

Which of the following is true? There are 3 answers.

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• 
• 
• 

• 20%

• 40%

• 50%

• 60%