Exponential review

What is the growth or decay rate for the following equation?
y = 2.5(1.15)^x

• -15% decay
• 115% growth
• 15% growth
• 25% growth

Tags

CCSS.HSF-IF.C.8B

What is the growth or decay rate for the following equation?
y = 1/3(0.7)^x

• 7% decay
• 70% decay
• 30% growth
• 30% decay

Tags

CCSS.HSF-IF.C.8B

A population has a growth/decay factor of 0.90.  What is happening to the population?

• It grows at a rate of 90%
• It dies at a rate of 90%
• It grows at a rate of 10%
• It dies at a rate of 10%

Tags

CCSS.HSF-IF.C.8B

A population has a growth/decay factor of 1.045 What is happening to the population?

• It grows at a rate of 45%
• It grows at a rate of 4.5%
• It dies at a rate of 45%
• It dies at a rate of 1045%

Tags

CCSS.HSF-IF.C.8B

You have inherited land that was purchased for $30,000 in 1960. The value of the land increased by approximately 5% per year. What is the approximate value of the land in the year 2011?

• $344,022
• $31,500
• $15,000
• $28,500

Tags

CCSS.HSF.BF.A.2

The original value of a painting is $1400, and the value increases by 9% each year. Write an exponential growth function to model this situation.

• y=1400(1.09)^x
• y=1.09(1400)^x
• y=1400(.91)^x
• y=1.09^x

Tags

CCSS.HSF.LE.A.2

What is the y-intercept of the function?

• 2
• 3
• 1
• -2

Tags

CCSS.HSF-IF.C.7E

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What percent did the population increase each year?

• 4%
• It doesn't say
• I don't know
• 400%

Tags

CCSS.HSF-LE.A.1C

Is this exponential growth or decay?

• Growth
• Decay

Tags

CCSS.HSF-IF.C.8B

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x
• y=30(5000)^x
• y=5000(1.3)^x
• y=5000x^x

Tags

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.B.5