Interpret Exponential Functions

Describe this function.

• Exponential Growth

• Exponential Decay

• Linear Positive

Describe the function.

• Exponential Growth

• Exponential Decay

• Linear

Which scenario best matches the expression 12(1.015)^t

• A population of elephants begins with 12 elephants in a wildlife refuge 1975. The elephants increase in number by 1.5% each yaer.
  

• A population of elephants begins with 12 elephants in a wildlife refuge 1975. The elephants decrease in number by 1.5% each yaer.

The expression 12(1.015)^t models the population of elephants in a wildlife refuge after t years since 1975.
What does the value 12 represent?

• The predicted increase in number of elephants in the refuge each year.

• The predicted decrease in number of elephants in the refuge each year.

• The number of years it will take for the elephant population to stop increasing.

• The initial amount of elephants in the park.

What equation matches the graph?

• f(x) = 3^x

• f(x) = (⅓)^x

• f(x) = log₃(x)

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• 
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What is the equation of the graph shown, and what is the y-intercept?

• y = 1⁄3 (3)^x ; a = 1⁄3

• y = 1⁄3 (3)^x ; a = 3

• y = 3 (1/3)^x ; a = 1⁄3

• y = 3 (1/3)^x ; a = 3

In an exponential function, what does the 'b' represent? 

• SLOPE

• GROWTH FACTOR

• Y-INTERCEPT

• EXPONENT

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

• Exponential Growth

• Exponential Decay

• Linear

• None

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

• 300

• 1.16

• .16

• x