Modeling With Exponential Functions

Compare f(x) = 3^x- 4 with the basic function g(x) = 3^x

• 4 units up

• 4 units to the left

• 4 units to the right

• 4 units down

• Because the 0.25 was bigger than one

• Because the 1.3 was bigger than one

• Because the 0.25 was less than one

• Because the 1.3 was less than one

Is the function growth or decay:

y= .3 (5)^x

• Growth

• Decay

Is the function growth or decay:

y= 2 (.3)^x

• Decay

• Growth

Is the function growth or decay:

y= 5 (.89)^x

• Decay

• Growth

You put $590 dollars in a savings account that pays 5.8% annual interest. How much money will you have after 8 years?

• 926.24

• 1050.88

• 850.36

• 790.24

Your car has a value of $10,948 but is decreasing at a rate of 3.5% yearly. How long will it take for your car to have a value of $5,474?

• 19.46

• 10

• 14

• 25.83

(Growth and Decay Formula) A town’s population is decreasing at a rate of 15% yearly. After 10 years, they have 48,962 people. What was the initial population?

• 248,664.3

• 2486.3

• 365,019.88

• 143,987.65

A town’s population is 75,488 people but is increasing at a rate of 9.2% yearly. How long will it take for the town to have 100,000 people?

• 3.19

• 6.2

• 10.5

• 1.3

Joelle invested $19,000 in an account paying an interest rate of 4.7% compounded continuously. How much money would be in the account after 12 years?

• 33,963.3

• 48,769.3

• 22,901.4

• 66,908.7