Exponential Functions Review

Determine whether each table or rule represents a linear or an exponential function.

• Linear 
• Exponential 

Determine whether each table or rule represents a linear or an exponential function.

• Linear 
• Exponential 

The function given is an example of growth or decay?

 $y=2^x$  

• Growth

• Decay

The function given is an example of growth or decay?

 $y=3\cdot\left(\frac{1}{2}\right)^x$  

• Growth

• Decay

The function given is an example of growth or decay?

 $y=0.2\cdot\left(7\right)^x$  

• Growth

• Decay

Karen bought a car for $10,000. The value of the car depreciates by about 20% each year. Which function below can be used to find the current VALUE of her car?

•  $y=10000\cdot20^x$  

•  $y=10000\cdot80^x$  

•  $y=10000\cdot0.80^x$  

•  $y=10000\cdot0.20^x$  

Karen bought a car for $24,000. The value of the car depreciates by about 13% each year. Which function below can be used to find the VALUE of her car? 

•  $y=24000\cdot0.13^x$  

•  $y=24000\cdot87^x$  

•  $y=24000\cdot13^x$  

•  $y=24000\cdot0.87^x$  

The expression 12(1.015)^t models the population of elephants in a wildlife refuge after t years since 1975.
Is the population of elephants increasing or decreasing?

• Increasing
• Decreasing

Which function will shift y = 2^x two units up?

• y = 2^x+2

• y = 2^x-2

• y = 2^x +2

• y = 2^x - 2

Which function will shift y = 2^x two units to the left?

• y = 2^x+2

• y = 2^x-2

• y = 2^x +2

• y = 2^x - 2