# 6.9: Exponential Functions

Difficulty Level: Advanced Created by: CK-12
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### Vocabulary Language: English

TermDefinition
domain The domain of a function is the set of $x$-values for which the function is defined.
Exponential Decay Function An exponential decay function is a specific type of exponential function that has the form $y=ab^x$, where $a>0$ and $0.
Exponential Form The exponential form of an expression is $b^x=a$, where $b$ is the base and $x$ is the exponent.
Exponential Growth Function An exponential growth function is a specific type of exponential function that has the form $y=ab^x$, where $h=k=0, a>0,$ and $b>1$.
Range The range of a function is the set of $y$ values for which the function is defined.

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