Texas Instruments PLUS TI-89 - Manual (Page 28)

Chapter 1: Getting Started 11
01START DOC TI-89/TI-92Plus:Getting Started (English) Bob Fedorisko Revised: 02/23/01 10:47 AM Printed: 02/23/01 2:10 PM Page 11 of 12
Steps
³
TI . 89
Keystrokes
›
TI . 92 Plus
Keystrokes Display
1. Display the Y= Editor. ¥ # ¥ #
2. Enter the function
(abs(x 2 м 3) м 10)/2 .
c ½ A
¸
X Z 2 | 3 d |
1 0 d e 2
¸ c 2 ½ A
¸
X Z 2 | 3 d |
1 0 d e 2
¸
3. Display the graph of the
function.
Select 6:ZoomStd by pressing 6 or by
moving the cursor to 6:ZoomStd and
pressing
¸ .
„ 6 „ 6
4. Turn on Trace.
The tracing cursor, and the x and y
coordinates are displayed.
… …
5. Open the MATH menu and select
3:Minimum .
‡ D D ¸ ‡ D D ¸
Graphing a Function
The example in this section demonstrates some of the graphing capabilities of the
TI - 89 / TI - 92 Plus . It illustrates how to graph a function using the Y= Editor. You will learn
how to enter a function, produce a graph of the function, trace a curve, find a minimum
point, and transfer the minimum coordinates to the Home screen.
Explore the graphing capabilities of the TI - 89 / TI - 92 Plus by graphing the function
y=(|x 2 м 3| м 10)/2 .
entry line
“pretty print”
display of the
function in the
entry line
tracing
cursor