Drawing A Line, Circle, Or Text Label On A Graph - Texas Instruments TI-89 Manual Book

Drawing a Line, Circle, or Text Label on a Graph

Clearing All
Drawings
Tip: You can also enter
ClrDraw on the Home
screen's entry line.
Drawing a Point or a
Freehand Line
Tip: When drawing a
freehand line, you can move
the cursor diagonally.
Note: If you start drawing
on a white pixel, the pencil
draws a black point or line.
If you start on a black pixel,
the pencil draws a white
point or line (which can act
as an eraser).
You can draw one or more objects on the Graph screen,
usually for comparisons. For example, draw a horizontal line to
show that two parts of a graph have the same y value. (Some
objects are not available for 3D graphs.)
A drawn object is not part of the graph itself. It is drawn "on top of"
the graph and remains on the screen until you clear it.
From the Graph screen:
¦
2 ˆ
TI-89:
ˆ
TI-92 Plus:
and select 1:ClrDraw
— or —
¦
Press † to regraph.
You can also do anything that causes the
redraw the graph (such as change the Window variables or deselect
a function on the Y= Editor).
From the Graph screen:
2 ‰
1.
TI-89:
‰
TI-92 Plus:
and select .
1:Pencil
2. Move the cursor to the
applicable location.
To draw a:
Point (pixel-sized)
Freehand line
After drawing the point or line,
you are still in "pencil" mode.
¦
To continue drawing, move
the cursor to another point.
¦
To quit, press N.
.
Smart Graph
Do this:
Press ¸.
Press and hold ¤, and move the
TI-89:
cursor to draw the line.
Press and hold ‚, and move
TI-92 Plus:
the cursor to draw the line.
To quit drawing the line, release ¤ or ‚.
Chapter 12: Additional Graphing Topics
feature to
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