Exponential Functions : STAAR Review

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AI.9.9.C

• 42
• decreases
• 50%
• 50
• 40%
• 90%
• increases
• 22

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AI.9.9.B

The table shows the value in dollars of a boat at the end of x years. Which exponential function best models the data?

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AI.9.9.C

The value of a stamp collection is currently is $2,750. It increases on average by about 1.75% each year. Write a function to model the value of the stamp collection after x number of years.

(write equation in y= form)

Mathematical Equivalence

ON

Answer explanation

Remember, when you'e given the percent rate, change the percent to decimal then add to 1 if it increases. Subtract from 1 if it decreases.

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AI.9.9.C

• The graph of the function is increasing for all values of x.

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AI.9.9.D

• x
• >
• -2
• y
• <
• -1
• 1
• 2

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CCSS.HSF-IF.C.7E