| Introduction | Task | Process |Evaluation | Conclusion | Teacher Resources |

Can a cricket be used as a thermometer? In fact yes, crickets vary the
number of chirps they produce with the temperature. If I give you a linear
equation to use and a cricket, you can then tell me the temperature. This
is one way you could use an Algebra equation in real life. We will use
information from real life situations and we will write linear equations
to fit those real life situations.

We have studied solving and graphing linear equations. We have also studied the slope-intercept form of a line. Now we will visit the Internet and see how linear equations come up in real life.

You will work in groups. Your group will chose a real life situation to investigate. Some of you will compute the number of calories that you will burn dancing or golfing or running. Some of you will investigate car prices, maybe the cost of a TransAm or a Corvette. Others will investigate scores in the NBA or WNBA.

You will gather data, write an equation, draw a graph and collaborate to draw conclusions based on analysis of your data. You will also send e-mail to Dr. Math. All to see how linear equations are part of our daily life.

1.Get into your assigned group.

2.Choose a real life situation from those listed here:

Burning Calories

Buying Cars

Basketball Statisitics

3.Ask your teacher for the worksheet
pertaining to the real life situation that your group has chosen to investigate.
Each

member of your group
will need a copy of the worksheet.

- Calories Burned during Exercise http://www.nutristrategy.com/activitylist.htm
- GTE Superpages - New Cars http://cg.gte.net/new/
- Yahoo! Sports: NBA - Sortable Season Stats/All Players http://bball.yahoo.com/nba/stats
- Yahoo! Sports: WNBA - Sortable Season Stats http://bball.yahoo.com/wnba/stats

to complete parts of the worksheet individually and parts of it with the other students in your group. You may certainly

ask each other for help as needed.

6.Each group needs to e-mail one
question to Dr. Math about a real life situation. (Your question needs
to be approved

by your teacher before
it is mailed. You need to have your teacher's signature by this item on
your worksheet.) Click

on the following site
when you have your question ready and approved, scroll down to the e-mail
box and send your

e-mail. You'll need
to get your school's e-mail address from your teacher.

Write to Dr. Math http://www.mirrors.org.sg/mathforum/dr.math/ask.html

7.Each student will need to give
an oral report in class describing one way they could use this information
in their daily

life.

Your project will be evaluated on the following
criteria:

- each student needs to turn in a completed worksheet (Be sure your teacher's signature is on your worksheet by question 8.)
- each student needs to turn in one line graphed on graph paper (Be sure your graph is well labeled)
- each group needs to turn in a print out of Dr. Math's response to your question (In order to do this, you'll need to check Dr. Math's site later in the week for his answer to your question.)
- each student needs to have given a short oral report about how they could use this information in their daily life each student should be able to answer questions on a quiz showing that they can write an equation based on given data

You may still be wondering about those chirping
crickets! If you would like to investigate with a cricket in your backyard,

here is an equation I found which will approximate
that situation: y = 0.20x + 6 where x represents the number of chirps in
a

minute and y represents the temperature in degrees
Celsius.

I hope you had fun investigating these real life
situations. Many people in many careers write equations and use them to

predict situations and to set their sales prices.
Now, you have seen how linear equations are part of your daily life.

A teacher who uses this site will need to print
out the worksheets listed below and have multiple copies of these worksheets

photocopied. You will need to either provide
the students with graph paper or tell the students to bring their own graph

paper. And, you will need to provide the students
with your school's e-mail address.

Here are some additional sites to use with
your students for further investigations:

- How Many Calories Burned? http://www.ocs.cnyric.org/howmany.htm
- Table 13: Calories Burned During Physical Activities http://www.nih.gov/news/stepbystep/calories.htm
- Blue Cross Blue Shield of Delaware - Calorie Calculator http://www.bcbsde.com/advcalor.htm
- GTE Superpages - Used Cars http://cg.gte.net/used/cgi-bin/
- Kelley Blue Book - kbb.com http://www.kbb.com/index.html
- CNN/SI - Baseball - Historical Profiles http://www.cnnsi.com/baseball/mlb/historical_profiles/

Special thanks to Jane M. Brown