Exponential Growth and Decay

• Growth

• Decay

• Neither

10, 5, 2.5, 1.25, ... Is an example of exponential...

• Growth

• Decay

• Neither

• Growth

• Decay

• Neither

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the decay factor?

• ^.08

• ^1.08

• .92

• 8

James' 70 in. giant peach doubles in size every week. Write an expression that would represent how big the peach is after 5 weeks.

• 70(2)³⁵

• 70(2)⁵

• 2(70)⁵

• 5(70)²

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

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

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

• 300

• 1.16

• .16

• x

• Growth

• Decay

• Linear

Which graph represents exponential growth?

• 
• 
• 
•