The value of a car is $15,000 and depreciates at a rate of 8% per year. Is this a growth or decay?

Daniel’s Print Shop purchased a new printer for $35,000. Each year it depreciates at a rate of 5%. Is this a growth or decay?

Using the exponential function equation f(x)=ab^x, where a is the starting value and b is the growth or decay, and x is the time, find the population of rabbits after 6 months if the population triples every month and initially there are 50 rabbits.

Using the exponential function equation f(x)=ab^x, where a is the starting value and b is the growth or decay, and x is the time, find the value of a house after 15 years if it initially worth $250,000 and increases by 5% each year.

Using the exponential function equation f(x)=ab^x, where a is the starting value and b is the growth or decay, and x is the time, find the population of bacteria after 5 hours if it doubles every hour and initially has 100 bacteria.

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What is the population of the town 21 years later?

Using the exponential function equation f(x)=ab^x, where a is the starting value and b is the growth or decay, and x is the time, find the population of fish after 8 weeks if the population doubles every week and initially there are 1000 fish.

The foundation of your house has about 1,200 termites. The termites grow at a rate of about 2.4% per day. How long until the number of termites doubles?

You have inherited a house that was purchased for $100,000 in 2010. The value of the house increased by approximately 2% per year. What is the approximate value of the house 11 years later ?

Suppose you deposit $3000 in a savings account that pays interest at an annual rate of 4%. Is this a growth or decay?

Your shiny new boat cost $7650. The depreciation for your boat is 14% per year. Is this a growth or decay?

Gasoline costs $1.99 per gallon. The price per gallon increases an average of 6% per month. Is this a growth or decay?

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Is this a growth or decay?

In 1985, there were 285 cell phone subscribers in the small town of Centerville. The number of subscribers increased by 75% per year after 1985. Is this a growth or decay?

You buy a new computer for $2100. The computer decreases by 50% annually. Is this a growth or decay?

Twenty years ago, Mr. Davis purchased his home for $160,000. Since then, the value of the home has increased about 5% per year. Is this a growth or decay?

Exponential growth is  $$y=a\left(1+r\right)^x$$  , and exponential decay is  $$y=a\left(1-r\right)^x$$  . What does "r" represent?