Texas Instruments TI-73 EXPLORER - Manual (Page 173)

Chapter 9: Function Graphing
167
7309ENG.DOC CH 9 Function Graphing, English Julie Hewlett Revised: 07/29/98 12:14 PM Printed: 05/19/99
9:01 AM Page 167 of 24
Defining Functions in the Y= Editor &
Use the Y= editor to define up to four functions,
Y
1,
Y
2,
Y
3
, and
Y
4
, in terms of the independent variable, X.
Press & to display the Y= editor. The TIN73 graphs up to four
defined functions at the same time.
If the result of an expression is not a real number, that point is
not plotted. You do not get an error.
&
Entering Functions Entering Functions
Functions can consist of variables, lists, trigonometric or
logarithmic expressions, or variations of already defined
functions (for example,
Y
2
=2 ¦ Y
1
). Access a
Y
n
variable by
pressing - }
2:Y-Vars
.
Define
Y
2
=3X+5.
1. Display the Y= editor.
&
2. Move the cursor to the
function that you want to
define,
Y
2
.
#
3. Clear
Y
2
, if necessary.
:
4. Enter
Y
2
=3X+5
.
3
I \
5
³
If you tried the chapter
example problem, then Y
1
=2X.