Growth or Decay Functions

y = 0.5 (1.081)^x

^{What is the initial amount}

• 1.081

• 108.1

• 8.1

• 0.5

y = 0.5 (1.081)^x

^{What percent did it grow?}

• 0.5

• 1.081

• 108.1

• 8.1

• 81

y = 5000(0.32)^x

^{What is the decay rate?}

• 32%

• 132%

• 68%

• 0.32

y = 240(1.0375)^x

^{What is the percent growth?}

• 1.0375

• 375%

• 37.5%

• 3.75%

Classify the model as Exponential GROWTH or DECAY.
A=10(1.01)³

• Growth

• Decay

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

• Exponential Growth

• Exponential Decay

• Linear

• None

What type of function is y = 7(5/4)^x?

• Exponential Growth

• Exponential Decay

• Linear

• None of the above

What is b, the common ratio, for the function: f(x) = 300(1.16)^x?

• 300

• 1.16

• .16

• x

A population of 2200 beetles is too large to sustain and decreases in population each month at a rate of 5%. How would you write your decay factor, b?

• -5

• -.05

• .95

• .05

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