user manual

3-6 Function Graphing
8303FUNC.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:16 PM Printed: 02/19/01 1:35
PM Page 6 of 28
8303FUNC.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:16 PM Printed: 02/19/01 1:35
PM Page 6 of 28
To define a function from the home screen or a program,
begin on a blank line and follow these steps.
1. Press
ƒ
[
ã
], enter the expression, and then press
ƒ
[
ã
] again.
2. Press
¿
.
3. Press
 ~
1 to select 1:Function from the
VARS Y
.
VARS
menu.
4. Select the function name, which pastes the name to the
cursor location on the home screen or program editor.
5. Press
Í
to complete the instruction.
"
expression
"
!
Y
n
When the instruction is executed, the TI
-
83 stores the
expression to the designated variable
Y
n
, selects the
function, and displays the message
Done.
You can calculate the value of a
Y=
function Y
n
at a
specified
value
of
X. A list of
values
returns a list.
Y
n
(
value
)
Y
n
({
value1
,
value2
,
value3
,
. . .
,
value n
})
Defining a
Function from
the Home Screen
or a Program
Evaluating Y=
Functions in
Expressions