Exponential Growth and Decay Rate

Write a linear function that represents the situation shown.

• f(x) = 900(1.9)^t

• f(x) = 900(0.1)^t

• f(x) = 900(0.91)^t

• f(x) = 900(1.09)^t

Write a linear function that represents the situation shown.

• f(x) = 20000(1 - 0.134)^t

• f(x) = 20000(1 + 0.134)^t

• f(x) = 20000(1 + 0.0134)^t

• f(x) = 20000(1 - 0.0134)^t

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(0.14)^x

• y=6(1+14)^x

• y=6(1.14)^x

• y=6(0.86)^x

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

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

• Exponential Growth

• Exponential Decay

• Linear

• None

Is this exponential growth or decay?

• Growth

• Decay

A population of fish starts at 8,000 and decreases by 6% per year. What is the population of fish after 10 years?

• 14327

• 4309

• 839

• 7680

Cooper purchased a new truck for $35,000. Each year it depreciates at a rate of 5%. How much will the truck be worth in 8 years?

• $23,219.72

• $136.72

• $51,710.94

• $16,710.94

A stamp gets more expensive each year.  It increases in value by 60 % each year.  What is the growth FACTOR?

• .6

• .06

• 1.6

• .4

Suppose you deposit $3000 in a savings account that pays interest at an annual rate of 4%.  What is the growth factor?

• .96

• 1.4

• 1.04

• $3000