Algebra 1 Exponential Functions

T1 Which function models the data in the table?

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CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

T1 SAT Bacteria are growing in a liquid growth medium. There were 300,000 cells per milliliter during an initial observation. The number of cells per milliliter doubles every 3 hours. How many cells per milliliter will there be 15 hours after the initial observation?

• 1,500,000

• 2,400,000

• 4,500,000

• 9,600,000

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CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

• 0

• 1

• 27

• 270

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CCSS.HSF.IF.A.2

T2 Thomas counts the number of cars he sees in the parking lot of the school each hour of the day. He counted the following number of cars the first four hours of the day. 1st hour 12, 2nd hour 24, 3rd hour 36, 4th hour 48. What is true of the function Thomas wrote that represents the number of cars as a function of the number of hours, h? Select all that apply.

• The function is linear.

• The function is exponential.

• The common ratio is 12.

• The common difference is 12.

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CCSS.HSF.LE.A.1

• In 5 years

• In 10 years

• In 15 years

• In 20 years

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CCSS.HSA.CED.A.1

• The y-intercept is 8000.

• The function shows an investment that increases exponentially.

• The interest rate is 2.5% per year.

• The investment doubles every 2.5 years.

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CCSS.HSF.LE.B.5