User Guide

Chapter 8: Draw Instructions 125
Drawing Horizontal and Vertical Lines
Drawing a Line Directly on a Graph
To draw a horizontal or vertical line when a graph is displayed, follow these steps.
1. Select 3:Horizontal or 4:Vertical from the DRAW menu. A line is displayed that moves as you
move the cursor.
2. Place the cursor on the y-coordinate (for horizontal lines) or x-coordinate (for vertical lines)
through which you want the drawn line to pass.
3. Press Í to draw the line on the graph.
To continue drawing lines, repeat steps 2 and 3.
To cancel
Horizontal or Vertical, press ‘.
Drawing a Line from the Home Screen or a Program
Horizontal (horizontal line) draws a horizontal line at Y=y. y, which can be an expression but not a
list.
Horizontal y
Vertical
(vertical line) draws a vertical line at X=x. x, which can be an expression but not a list.
Vertical x
To instruct the TI-84 Plus to draw more than one horizontal or vertical line, separate each
instruction with a colon (
: ).
MathPrint™ Classic