8.1 - 8.3 Quiz Review

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. How many mosquitoes will there be after 4 months?

• 9766
• 9006
• 9765
• 5433

What is the growth factor of the exponential function represented by y = 20(5^x)

• 20
• 1
• 5
• 5x

What is the y-intercept represented by the equation y = 10(5^x)

• 5
• 5x
• 10
• 2

The graph of an exponential function will be a 

• line
• curve
• stair step
• none of these

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

What type of function is y = 7(5/4)^x?

• Exponential Growth
• Exponential Decay
• Linear
• None of the above

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

• Growth
• Decay

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

• 300
• 1.16
• .16
• x

What is the decay rate in the following model?

A=1200(.85)⁶

• 1200

• .15

• .85

• 6

What is the decay factor in the following model?
A=1200(.85)⁶

• 1200
• -.15
• .85
• A