Algebra- Ch. 7 Review (Exponential Functions)

What type of function is

 $y\ =\ 7\left(1.25\right)^x$  

• Exponential Growth

• Exponential Decay
  

• Linear

• None of the above

What type of function is $F\left(x\right)=\ 2\left(\frac{1}{7}\right)^x$  

• Exponential Growth

• Exponential Decay
  

• Linear

• None of the above

What type of function is $y=\left(\frac{5}{10}\right)^x$  

• Exponential Growth

• Exponential Decay
  

• Linear

• None of the above

What type of function is  $y=2^x$   

• Exponential Growth

• Exponential Decay
  

• Linear

• None of the above

Pick the equation that is exponential decay

• 
  

  $y=2000\left(0.88\right)^x$
  

• $y=0.5\left(1.88\right)^x$

• $y=4x^2+2x+1$

• $y=3x+4x^3$

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• $y=15\left(35\right)^x$

• $y=15\left(1.35\right)^x$

• $y=15\left(0.35\right)^x$

• $y=35\left(1.15\right)^x$

Pick the equation that is exponential growth

• 
  

  $y=2\left(0.5\right)^x$
  

• $y=0.5\left(2\right)^x$

• $y=x^2$

• $y=3x+4$

Identify the "a" value of the function
 $f\left(x\right)=2\left(4\right)^x$  

• 2

• 4

• 8

•  $\left(2\right)^x$  

A new savings account is opened with $400 and gains 3% every year. What is the exponential function?

• 
  

  $f\left(x\right)=400\left(1+3\right)^x$
  

• $f\left(x\right)=400\left(1-0.03\right)^x$

• $f\left(x\right)=400\left(1+0.03\right)^x$

• $f\left(x\right)=400\left(0.03\right)^x$

The value of a car is $15,000 and decrease at a rate of 8% per year. What is the exponential function?

• 
  

  $y=8\left(15000\right)^x$
  

• $y=15000\left(1+0.08\right)^x$

• $y=15000\left(1-0.08\right)^x$

• $y=15000\left(0.08\right)^x$