Exponential Practice

What type of function is f(x)=2(1/7)^x ?

• Exponential Growth
• Linear
• Exponential Decay
• None of the Above

What is the y-intercept of the function?

• 2
• 3
• 1
• -2

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

• Exponential Growth
• Exponential Decay
• Linear
• None

What does the graph represent?

• Exponential Decay

• Exponential Growth

Which does y= 2(.5)^x represent?

• Exponential Growth

• Exponential Decay

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

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

The function y = 125(1.13)^x represents Mr. Thielen's recent investments where x is measured in years.  Which is NOT true?

• Mr. Gantz initial invested $125
• Mr. Gantz's money grows by 13% per year
• After 4 years Mr. Gantz will have about $203.81
• Mr. Gantz earns more money in year one than in year 5

Does this table represent a linear or exponential function?

• Exponential

• Linear

Suppose you put $1000 into the bank, and you earn 12% interest each year. Write a function that tells the amount of money you have, M(t), after t years

• $M\left(t\right)=12\left(1000\right)^t$

• $M\left(t\right)=1000\left(.12\right)^t$

• $M\left(t\right)=1.12\left(1000\right)^t$

• $M\left(t\right)=1000\left(1.12\right)^t$

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

• f(x)=400(1+3)^x
• f(x)=400(1-0.03)^x
• f(x)=400(1+0.03)^x
• f(x)=400(0.03)^x