TEKS.MATH.8.12C

The function y = 125(1.13)^x represents Mr. Gantz's recent investments where x is measured in years.  Which is NOT true?

• Mr. Gantz initial invested $125
• Mr. Gantz's money grows by 13% per year
• After 4 years Mr. Gantz will have about $203.81
• Mr. Gantz earns more money in year one than in year 5

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TEKS.MATH.8.12C

A child asks her dad for an allowance that starts with a penny and then doubles every day for a month. Which function can be used to model the amount of money, A, the child will receive each day, x?

• A(x) = 2(0.01)^x
• A(x) = 0.01(2)^x
• A(x) = 0.01(1 - 2)^x
• A(x) = 2(1.01)^x

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TEKS.MATH.8.12C

How confident are you feeling with exponential growth functions?

• Very confident and could help a friend!

• Fairly confident, but would like more practice.

• Not confident yet and would like some help.

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TEKS.MATH.8.12C

If the growth rate is 80%, what is the growth factor?

• 0.2

• 0.8

• 1.2

• 1.8

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TEKS.MATH.8.12C

Classify the model of an Exponential GROWTH.

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TEKS.MATH.8.12C

This is an example of:

• Linear Growth

• Linear Decay

• Exponential Growth

• Exponential Decay

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TEKS.MATH.8.12C

Which of the following exponential functions represents an initial value of 1780 and a growth of 18% for x years?​

(a)  

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TEKS.MATH.8.12C

While in 6th grade, Heather invested $20 in a bank account that paid 6% in annual interest. Which equation could be used to find the balance of her account in x years?

• A = 20(1.06)^x

• A = 20(0.06)^x

• A = 20(6)^x

• A = 20(0.16)^x

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TEKS.MATH.8.12C

Based on the table, what is the minimum amount she should deposit in the savings account every month?

• A $200

• B $300

• C $100

• D $400

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TEKS.MATH.8.12C