Staar Exponential Functions

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

• x

• >

• -2

• y

• <

• -1

• 1

• 2

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CCSS.8.F.A.1

CCSS.HSF.IF.B.5

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

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CCSS.HSF-IF.C.7E

• The interest the savings account earned for the first year

• The annual interest rate of the savings account

• The number of years the savings account has earned interest

• The starting balance of the savings account

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CCSS.HSF.LE.B.5

In this exponential function, the range approaches zero but never includes it. What is the range?

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CCSS.HSF-IF.C.7E

log₂(¹/₈) = -3

• 2^-3 = ¹/₈

• 2^1/8 = -3

• -3² = ¹/₈

• -3^1/8 = 2

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CCSS.HSF.BF.B.5

Logarithms and Exponentials are what?

• parallel

• perpendiular 

• inverses

• congurent

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CCSS.HSF.BF.B.5

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CCSS.HSF-IF.C.8B