Texas Instruments TITANIUM TI-89 - Manual (Page 473)

Additional Graphing Topics 473
Graphing Directly from the Home Screen Graphing Directly from the Home Screen Graphing Directly from the Home Screen Graphing Directly from the Home Screen
The Graph command lets you graph an expression from the Home screen without using
the Y= Editor. Unlike the Y= Editor, Graph lets you specify an expression in terms of any
independent variable, regardless of the current graphing mode.
2 £ If the expression is already stored to a variable:
1. Display the Y= Editor, highlight the desired function, and
press
¸
.
2. Press
2 £
. Type the variable name that contains
the expression, and press
¸
twice.
Important: To recall a function variable such as f1(x), type
only f1, not the full function name.
3. Press
¸
to save the recalled expression in the
Y= Editor’s function list.
Note:
2 £
is useful if an expression is stored to a
variable or function that does not correspond to the
Y= Editor, such as a1 or f1(x).
If the expression is in
terms of: Use the Graph command
as shown in this example:
The native
independent variable
Method Description
Graph 1.25x
ù
cos(x)
For function graphing, x is the native
variable.