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Texas Instruments TI-82 Manual

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x Introduction
8200$FNT.DOC TI-82, Front Matter, English Bob Fedorisko Revised: 02/09/01 12:16 PM Printed:
02/09/01 1:12 PM Page x of 10
Glossary
This glossary provides definitions for important terms that are used throughout
this guidebook.
Expression
An expression is a complete sequence of numbers, variables,
functions, and their arguments that can be evaluated to a single
answer.
Function
A function, which may have arguments, returns a value and can
be used in an expression.
A function is also the expression entered in the
Y=
editor used
in graphing and
TABLE
.
Graph Database
A graph database is composed of the elements that define a
graph: functions in the
Y=
list,
MODE
settings, and
WINDOW
settings. They may be saved as a unit in a graph database to
recreate the graph later.
Graph Picture
A picture is a saved image of a graph display, excluding cursor
coordinates, axis labels, tick marks, and prompts. It may be
superimposed on another graph.
Home Screen
The Home Screen is the primary screen of the TI
.
82, where
expressions can be entered and evaluated and instructions can
be entered and executed.
Instruction
An instruction, which may have arguments, initiates an action.
Instructions are not valid in expressions.
List
A list is a set of values that the TI
.
82 can use for activities such
as graphing a family of curves, evaluating a function at multiple
v
alues, and entering statistical data.
Matrix
A matrix is a two-dimensional array on which the TI
.
82 can
perform operations.
Menu Items
Menu items are shown on full-screen menus.
Pixel
A pixel (picture element) is a square dot on the TI
.
82 display.
The TI
.
82 display is 96 pixels wide and 64 pixels high.
Variable
A variable is the name given to a location in memory in which a
v
alue, an expression, a list, a matrix, or another named item is
stored.
… 10 …


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