Exponential Modeling

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CCSS.HSF.LE.A.2

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Rhonda deposited $3000 in an account in the Merrick National Bank, earning 4.2% interest, compounded annually. She made no deposits or withdrawals. Write an equation that can be used to find B, her account balance after t years.

• B(t) = 3000(1 - 4.2)^t

• B(t) = 3000(1 + 4.2)^t

• B(t) = 3000(1 - 0.042)^t

• B(t) = 3000(1 + 0.042)^t

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CCSS.HSF.LE.A.2

HINT: Use your y= on the calculator to determine which one is equivalent.

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CCSS.HSF-IF.C.8B

What is a, the starting term, for the function: f(x) = 300(1.16)^x?

• 300
• 1.16
• .16
• x

Which of the following is an increasing exponential function whose y-intercept is 50?

• y = 50(.05)^x
• y = 50x - 4
• y = (2)^x + 50
• y = 50(1.4)^x

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CCSS.HSF.LE.A.2

Is this exponential growth or decay?

• Growth
• Decay

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CCSS.HSF-IF.C.8B

Which equation matches the graph?

• y = 2^x+3
• y = 2^x + 3
• y = 2^x
• y = 2^-x

Is y = 54(.20)^x growth or decay?

• Growth
• Decay

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CCSS.HSF-IF.C.8B

Write 0.14 as a percent.

• 1.4%
• 140%
• 14%
• 0.14%