Exponential Growth & Decay

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Malik bought a new car for $15,000. He was told that the car's value will decrease by 15% every year. Write an equation to represent the car's value after x years.

What type of function is shown in the graph?

• Linear
• Exponential Growth

• Exponential Decay

What type of function is shown in the graph?

• Linear
• Exponential Growth

• Exponential Decay

Kate's grandparents got her a piggy bank when she was born with $100 inside. Each year Kate adds $60 to the piggy bank. Write an equation to represent amount of money in her account after x years.

Determine if the following is an example of a linear OR exponential situation:

$150 is deducted from your savings account each month.

• Linear

• Exponential

• Neither

The value of an early American coin increases in value at a rate of 6.5% annually. If the purchase price of the coin this year is $1,950, write an equation to model the value in x years.

Kelli's mom takes a 400 mg dose of aspirin. Each hour, the amount of aspirin in a person's system decreases by about 29%. Write an equation to represent the amount of aspirin left in her system x hours after she took the aspirin.

Jonathan makes a weekly allowance of $25. He also makes $9.50 per hour at his job. Write an equation to represent the amount of money earned in a week if he works for x hours in a week.

Is the following function an example of decay or growth?

f(x)=2(0.85)^x

• Exponential Decay

• Exponential Growth