Exponential Review

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

• Exponential Growth
• Exponential Decay
• Linear
• None

 $f\left(x\right)=300\left(1.16\right)^x$  

What is a, the starting term, for the given function?

• 300

• 1.16

• .16

• x

Write an equation that models the following situation:

Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• $y=6\left(0.14\right)^x$

• $y=6\left(1+14\right)^x$
  

• $y=6\left(1.14\right)^x$
  

• $y=6\left(0.86\right)^x$

 $f\left(x\right)=13\left(.27\right)^x$  

Identify the y-intercept (initial value) in the given function.

• (.27)^x

• .27

• 13

• 3.51

• 1.27

Simplify the given expression. $\left(4n^4-8n+4\right)-\left(8n^2+4n^4+1\right)$  

•  $-8n^2-8n+3$ 

•  $-7n^2-8n+3$ 

•  $6n^2-8n+3$  

•  $-7n^2-4n+3$ 

 $2x+3\left(5x-7\right)=47$  

What value of x satisfies the following equation?

• 1

• 2

• 3

• 4

What is the multiplier for a 12% increase?

What is the multiplier for a 4% decrease?

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the exponential equation? Write it in the form y=a(b)^x

Classify the exponential function as growth or decay.

 $f\left(x\right)=1200\left(0.85\right)^x$  

• Growth

• Decay