1. End Warm Up Suppose that you are given a choice of investing:
$10,000 at a rate of 7%: y = 10,000 (1.07)t OR
$5,000 at a rate of 12%: y = 5,000 (1.12)t
When will the investments be worth the same?
If the money will be yours when you are 50,
which investment plan should you choose?
10 minutes
End

2. Answers Suppose that you are given a choice of investing:
$10,000 at a rate of 7%: y = 10,000 (1.07)t OR
$5,000 at a rate of 12%: y = 5,000 (1.12)t
When will the investments be worth the same?
about years
If the money will be yours when you are 50, which investment plan should you choose?
The first plan will yield $ , while the second plan will yield $ , so the second plan is the better choice.

3. Exponential Regression

4. Exponential Regression
When handed to you at the drive-thru window, a cup of coffee was 200oF. Some data has been collected about how the coffee cools down on your drive to school.   
1. Calculate the linear regression and use it to predict how cool the coffee will be in 15 minutes (look at your table).
2. Calculate the exponential regression and use it to predict how cool the coffee will be in 15 minutes.
3. Which regression do you think provides a more accurate prediction? Explain your reasoning.

5. Exponential Regression
In your groups, practice using exponential regression to answer each problem.
Resource Manager: Obtain one worksheet for each person
Time Keeper: 15 minutes
Reader/Recorder: Read each question out loud
Spy Monitor: Check in with other groups or my key

6. Homework
Independent Practice