Exponential Growth and Decay Vocab

Give the rate of decay:
y = 35(0.65)^x

• 35%
• 65%
• .35%
• 165%

Give the rate of growth:
y = 5(1.27)^x

• 127%
• 27%
• 5

Describe the function:
y = 57(1/3)^x

• growth by factor of 1/3
• decay by factor of 1/3
• growth by 2/3 
• decay by 1/3 %

Describe the function:
y = 1000(1 - 0.87)^x

• growth by 87%
• decay by 87%
• growth by 13%
• decay by 13%

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

• Growth
• Decay
• Linear
• None

Is the equation linear, exponential or neither?

• Linear
• Exponential
• Neither

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

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

Give the value of the growth factor:
y = 35(1.075)^x

• 35
• 0.075
• 7.5%
• 1.075

Determine the y-intercept of the function:
y = 1.25(5)^x

• 5
• 1
• .25
• 1.25

The population of turtles is doubling every 3 months.  If there are 400 turtles now, how many will there be in 2 years?  (Choose equation)

• y = 400(2)²
• y = 400(2)⁶
• y = 400(2)⁸
• y = 400 + 2(8)