Exponential Functions

Describe this function.

• Exponential Growth

• Exponential Decay

• Linear

• Absolute Value

• Exponential Growth

• Exponential Decay

• Quadratic

• Linear

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

Classify the model as Exponential GROWTH or DECAY.
A=10(1.01)³

• Growth
• Decay

What is the y-intercept of the function?

• (0 , 2)

• (0, 3)

• (1 , 0)

• (3, 0)

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

The function y = 125(1.13)^x represents Mr. Gantz's recent investments where x is measured in years.  Which is NOT true?

• Mr. Gantz initially invested $125.

• Mr. Gantz's money grows by 13% per year.

• After 4 years Mr. Gantz will have about $203.81.

• Mr. Gantz earns more money in year 5 than in year 1.

• After 4 years Mr. Gantz will have about $303.81.

Is the following function an example of decay or growth?

f(x)=2(0.85)^x

• Exponential Decay

• Exponential Growth

What is the x-intercept of the exponential function? 

• (0 , 1)

• (0 , 0)

• There is none.

• (1, 0)