Exponential Functions

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Explain how you know a TABLE represents an exponential function.

Explain how you know an EQUATION represents an exponential function.

The function

 $y=-\frac{1}{2}\left(4\right)^x$  , represents exponential __________.

Tags

CCSS.HSF-IF.C.8B

Explain how you know an equation represents exponential growth vs. exponential decay.

Which of these functions represents an initial value of 20 decreasing at a rate of 30%?

• $y=-30\left(20\right)^x$

• $y=20\left(0.7\right)^x$

• $y=20\left(0.3\right)^x$

• $y=-.3x+20$

Given the function

 $y=4\left(3\right)^x$  , what is the y-intercept?

•  $\left(0,3\right)$  

•  $\left(3,0\right)$  

•  $\left(4,0\right)$  

•  $\left(0,4\right)$  

•  $\left(0,0\right)$  

Given the function

 $y=4\left(3\right)^x$  , what is the growth factor?

Given the function

 $y=4\left(3\right)^x$  , what is the growth rate written as a percent (not a decimal)?