44

Using the TI-73: A Guide for Teachers

Measurement and Geometry

Activity—Part B

Have students perform the steps unless otherwise indicated.

1.Ask students: If the faucet were dripping twice as fast, what would be the volume after 1 hour? After 2 hours?

2.Tell students to predict what the graph of this equation would look like compared to the graph in Part A, step 11.

3.Use the Manual-Fitfunction to plot these data points for 1 hour and 2 hours.

a.First, change the settings for the viewing window.

'

Enter the numbers as shown in the screen at the right. Use # to move down the fields.

b.Now return to the Home screen and clear a line.

-l to return to the Home screen : to clear a line

Be sure you’re on a clear line because Manual-Fitmust display on its own line.

c.Access the - v CALC menu and select

Manual-Fit.

-v"""[

d.Access the - } menu and select Y1.

-} (above the 9 key)

Z b

e.Now display the graph. b

If you change your mind after pressing b, you’ll have to press ^ to get out of the Manual-Fitscreen.

© 1998 TEXAS INSTRUMENTS INCORPORATED