The object of this lab is to create a linear function of the number of
people saying their name versus the time it takes those people to say their
name.

Materials: students, stopwatch, data collection sheet, TI-82

Procedure:

1. Start with the first three people in your class. Have them say their
names one at a time as the teacher (or timekeeper) times how
long it takes.

2. Record your data points {(number of people, time)}.

3. Continue in increments of 3 recording the time for each go around.
If you do not end up with

enough students for the last trial, have the last person say their
name either one or two times to

make up the last increment.

4. Record your data. Choose 2 data points to get an estimate of the line
of best fit. Now, graph

your data on the TI-82 and compare the calculators estimate to your
own. How do they

compare?

5. Can you predict how long it will take for 25 people in the room? 150
people? the whole school?

From: Teachers Teaching with Technology, 1995 Summer Workshop

University of Texas at Arlington