Exponential Rates of Growth or Decay

Which equation models of Exponential DECAY?

Before using the rate (r) in an exponential equation, you should ________.

• divide the % by 100

• multiply the % by 100

• divide the % by 10

• multiply the % by 10

Choose the equation that is exponential decay

• y=2000(0.88)

• y=0.5(1.88)

Choose the equation that is exponential growth

• y=2(0.5)^x

• y = 0.5(2)^x

What is the rate of growth for the function: f(x) = 300(1.46)^x?

• 54%

• 1.46

• .46

• 46%

What is the starting value in the exponential equation y =3^x ?

• 3

• 0

• 1

What is the rate of decrease for the exponential equation y = 25(.35)^x ?

• 25

• 65%

• 35.%

• .35

What is the initial value for the exponential equation y = 25(.35)^x ?

• 25

• 65%

• 35%

• .35

What is the Decay FACTOR for the exponential equation y = 25(.35)^x ?

• .35

• 65%

• 35.%

• 25

A population of 1500 deer decreases by 1.5% per year. In 10 years there will be 1290 deer. Does this problem represent growth or decay?

• growth

• decay