TIp 3: Graphing a Function in the Standard Window
Fundamental Topics in Science © 2001 Texas Instruments
TIp 3-3
Try-It!
Ë
on Your TI
83 Plus
(continued)
Trace the Graph
Trace the (
X
,
Y
) values for
Y1=2X+3
on the graph screen.
To Do This Press Display
1. Enter trace mode.
)
2. Trace the (
X
,
Y
) values along the
graph.
X
and
Y
values display at the bottom
of the screen.
"
and
!
3. Quickly find
Y
when
X=
0
4
.
a
4
4. Notice that when
X=
0
4
then
Y=
0
5
.
b
On Your Own
Display a grid on the graph screen by selecting
GridOn
in the window format screen
(
-
g
).
Define
Y
2
=
0
0
X+6
.
Graph
Y
1
=2X+3
and
Y
2
=
0
0
X+6
at the same time and compare. Now trace along each function
to find the point of intersection. Record the point of intersection.
Hint:
Use
#
and
$
to move between functions.
Graph
Y
2
only.
Hint:
You must deselect
Y
1
so that the calculator does not graph it. To deselect
Y
1
, highlight its equal sign (
=
) in the Y= editor with
the cursor, and then press
b
. Notice the equal sign is no longer highlighted.
Cursor moves
to (
/
4,
/
5).
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