Texas Instruments TI-89 Titanium User Manual page 482

Drawing a Horizontal or Vertical Line
From the Graph screen:
1. 2 ‰
and select
5:Horizontal
are displayed on the screen.
If the line is initially displayed on an axis, it may be difficult to see. However, you can
easily see the flashing cursor.
2. Use the cursor pad to move the line to the appropriate position. Then press ¸.
After drawing the line, you are still in "line"
mode.
• To continue, move the cursor to
another location.
To quit, press N.
•
Use 2 to move the cursor in larger increments; 2 B, etc.
Note:
Drawing a Tangent Line
To draw a tangent line, use the ‡
1. Press ‡ and select
Additional Graphing Topics
or . A horizontal or vertical line and a flashing cursor
6:Vertical
toolbar menu. From the Graph screen:
Math
.
A:Tangent
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