Exponential Functions Review

Which of the following is an example of exponential growth?

• y = 2(0.5)^x

• The number of cells in a particular cell sample doubles in size every day.

• y= 9 (1/4)^x

• Laura adds $5 to her savings every week.

Which of the following is an example of exponential decay?

• y = 4 (1.18)^x

• A car's value decreases by 18% per year.

• y = 0.3(1.5)^x

• y = -3x + 5

What is the initial value for the function: f(x) = 300(1.16)^x?

• 300

• 1.16

• .16

• x

Classify the model as Exponential GROWTH or DECAY.

A=1200(.85)^x

• Growth

• Decay

Classify the model as Exponential GROWTH or DECAY.

A=10(1.01)^x

• Growth

• Decay

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

Is the following function exponential growth, exponential decay, linear, or none of the above?

y = 13x - 5

• Exponential growth

• Exponential decay

• Linear

• None of the above

The y-intercept for this exponential function is

• 3
• 6
• 1
• 9

Tags

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

Is the pictured graph growth, decay, or linear or none?

• Exponential Growth

• Exponential Decay

• Linear

• None

Tags

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.3

Make the percent to decimal.
25%

• 2.5
• 25
• 0.025
• 0.25

Tags

CCSS.6.NS.B.3