Unit 10 Exponent Functions Review

Select the equation to use for the given problem

A luxury yacht loses 12.5%of its value each year. What is the value of a $150,000 yacht after 6 years?

Select the equation to use for the given problem

A invasive species of aquatic algae has been tracked in Texas lakes. 5 years ago a study found there it be 243 parts per unit with a current study showing there to be 371 parts per unit. What is the growth rate of this specific species of algae?

Angel put $15,000 into a high yield savings account with an annual interest rate of 4.35%. At the end of the term the account balance is $20,208.70. How long was the money saved?

Round your answer to the nearest year

A lamborghini loses 15.75% of its value each year. What is the value of a $250,000 car after 4 years?

What is the equation that best represents the graph?

• y=2^y
• y=2^x
• y=2^-x
• y=x²

What is the domain and range of the function y=2^x ?
Use the graph to help!

•  Domain: −∞<x<∞
  Range: y>0
• Domain: −∞<x<∞
  Range: y>1
• Domain: −2<x<∞
  Range: y>0
• Domain: −∞<x<∞
  Range: y<0

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

• Exponential Growth

• Exponential Decay

• Linear

• None

Given y=3^x determine the y-intercept 

• (0,1)
• (0,3)
• No Y-intercept
• y=1

Which of the following is an increasing exponential function whose y-intercept is 50?

• y = 50(.05)^x
• y = 50x - 4
• y = (2)^x + 50
• y = 50(1.4)^x

What is the horizontal asymptote for the graph of

f(x)=13(0.5)^x ?

• y=0.5

• y=13

• y=6

• y=0