Operation Manual

DRAW
Operations 8-5
8208DRAW.DOC TI-82, Chapter 8, English Bob Fedorisko Revised: 02/09/01 12:23 PM Printed:
02/09/01 3:30 PM Page 5 of 16
Drawing Horizontal and Vertical Lines
While a graph is displayed, Horizontal and Vertical let you define lines on the
graph using the cursor. If a graph is not displayed, the instruction is copied to the
Home screen.
Directly on a Graph
1. When a graph is displayed, select
Horizontal
(item
3
) or
Vertical
(item
4
) from the
DRAW DRAW
menu.
2. A line is displayed that moves as you move the cursor. Position the
cursor where you want to draw the line. Press
Í
. The line is drawn
on the graph.
To continue to draw lines, repeat step 2. To cancel
Horizontal
or
Vertical
,
press
‘
.
From the Home Screen or a Program
Horizontal
(horizontal line) (
DRAW DRAW
item
3
) draws a horizontal line
at
Y
=
Y
(which can be an expression, but not a list).
Horizontal
Y
Vertical
(vertical line) (
DRAW DRAW
item
4
) draws a vertical line at
X
=
X
(which can be an expression, but not a list).
Vertical
X
For example,
Horizontal 7:Vertical 4:Vertical 5
displays: