Lesson 5.1 Review

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

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

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

What is a, the initial amount, for the function: f(x) = 300(1.16)^x?

• 300
• 1.16
• .16
• 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

What is the decay rate in the following model?

A=1200(.85)⁶

• 1200

• .15

• .85

• 6

What is r, the growth rate, for the function: f(x) = 300(1.16)^x?

• 300
• 1.16
• .16
• x

Is y = 5(1.04)^x growth or decay?

• Growth

• Decay

Is y = 4(.20)^x growth or decay?

• Growth
• Decay

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x
• y=30(5000)^x
• y=5000(1.3)^x
• y=5000x^x