February Holidays
Growth or Decay
Functions
Percent Rate
Word Problems
100
This one is for all of the couples out there!
Valentine's Day
100
How do I know if the exponential relationship below is growth or decay?
y = 3(0.56)x
Decay has a b value or decay factor less than 1.
100
f(3)=3^x
F(3)=(4)^x
F(3)=64
100
Is this exponential growth or decay?
What is the percent growth/decay rate?
y=5(0.5)^x
Exponential Decay
50%
100
2243
200
FDR, JFK
What is president's Day?
200
Do the following equations represent exponential growth, decay, or neither?
y=5x+6
Neither (It's linear! y=mx+b)
200
f(3)=(2/3)^x
8/27
200
Is this exponential growth or decay?
What is the percent growth/decay rate?
y=5(1.3)^x
Exponential Growth
30%
200
What will be the cost in 17 years?
$32,313.27
300
Happens only every 4 years, including this year.
What is Leap Year?
300
y=2(1.13)x
Does this function represent exponential growth or decay? What is the growth/decay RATE?
Exponential Growth
Rate: 0.13 or 13%
300
f(2)=(5)^x is a point on the graph?
What is (2, 25)
300
Is this exponential growth or decay?
What is the percent growth/decay rate?
y=1(0.01)^x
Exponential Decay
99%
300
16,941 people
400
Fat Tuesday?
What is Mardis Gras?
400
y=5(0.97)x
Does this function represent exponential growth or decay? What is the growth/decay RATE?
Exponential Decay
Rate: 0.03 or 3%
400
Does the graph represent exponential growth or decay?
Exponential Growth
400
Is this exponential growth or decay?
What is the percent growth/decay rate?
y=1/2(0.7)^x
Exponential Decay
30%
400
Is the function exponential growth or decay?
Write the equation to represent the graph. 
Decay
y = 2400 (0.5x)
500
6 More Months of Winter.
What is Ground Hog's Day?
500
Ms. Wiggins purchased a car for 26,400 and every year it decays by 12%. What can she expect the value of her car to be after 3.5 years?
y=26400(.88)3.5=$16,876.92
500
Annual sales of a fast food restaurant are $530,000 and increasing at a rate of 5% per year. What will the annual sales be in 6 years? (show the equation and answer)
530,000(1.05)6 =$710,250.69
500
Is this exponential growth or decay?
What is the percent growth/decay rate?
y=1/2(1.07)^x
Exponential GROWTH
7%
500
If you put $500.00 into an account and the account earns a 3% yearly interest rate. How much will be in the account after 5 years?
Round the nearest cent!
$579.64