©2002 Key Curriculum Press
Discovering Algebra Calculator Notes for the Texas Instruments TI-82
31
Note 3A • Tables
Once you have entered an equation into the
Y
screen, you can create a table of
values based on that equation.
Step 1: Enter the equation(s) into the
Y
screen. (See
Note 1H.
)
Step 2: Press
[TblSet]
.
a.
TblMin
is the first
x
-coordinate you want to see in the table.
b.
∆
Tbl
is the amount of increase or decrease between the
x
-coordinates in
the table.
c.
Select
Auto
for both
Indpnt
and
Depend
. (Use
Ask
for
Indpnt
to build a
table where you enter
x
-coordinates one at a time.) Usually you will
leave both of these settings on
Auto
.
Step 3: Press
[TABLE]
.
a.
You can scroll up and down the
x
-coordinates to search for a particular
y
-coordinate.
b.
You can arrow over to the
y
-column to see the number more accurately
displayed (if necessary) at the bottom of the screen.
c.
You can arrow up and highlight the
Y
1
header to see the equation
displayed at the bottom of the screen.
d.
If you press
while you are looking at the function, you can edit
the equation and see the changes in the table. This action will also
change the equation in the
Y
screen.
Table Zooming
When you are searching for a particular
y
-coordinate that does not appear to
be in the table, you can use a technique called “table zooming.” Let’s suppose
ENTER
2nd
2nd
C H A P T E R 3
Calculator Notes for the TI-82
(continued)
