Draw Operations 7-5
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.
To draw horizontal and vertical lines 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
¸. The line is drawn on the graph.
To continue to draw lines, repeat step 2. To cancel
HORIZONTAL or VERTICAL, press M.
HORIZONTAL (DRAW DRAW, item 3) draws a horizontal line
at Y=Y (which can be an expression, but not a list).
HORIZONTAL Y
VERTICAL (DRAW DRAW, item 4) draws a vertical line at
X=X (which can be an expression, but not a list).
VERTICAL X
Note: In the example above, the horizontal line is drawn first,
and then the vertical line is drawn.
Drawing Horizontal and Vertical Lines
Directly on a
Graph
From the Home
Screen or a
Program