1. Writing Exponential Equations From a Table

2. From 2 Points

3. From a Word Problem

4. Practice Word Problems
Suppose that you are observing the behavior of cell duplication in a lab. In one experiment, you start with one cell and the cell population is tripling every minute. Write an equation. x y

5. Practice Word Problems
Suppose that you are observing the behavior of cell duplication in a lab. In one experiment, you started with 100,000 cell and observed that the cell population decreased by half every minute.
Write an equation. x y

6. Depreciation: Matt bought a new car at a cost of $25,000
Depreciation:  Matt bought a new car at a cost of $25,000.  The car depreciates approximately 15% of its value each year.  a.)  What is the decay factor for the value of this car?                  
The decay factor is =  (Remember that the decay factor is 0 <  b < 1.)
b.)  Write an equation to model the decay value of this car where y is the value of the car;  x is the number of years since new purchase
c.)  What will the car be worth in 10 years?                                      Answer:  $4,921.86