3-20 Function Graphing
8303FUNC.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:16 PM Printed: 02/19/01 1:35
PM Page 20 of 28
8303FUNC.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:16 PM Printed: 02/19/01 1:35
PM Page 20 of 28
To display the ZOOM menu, press q. You can adjust the
viewing window of the graph quickly in several ways. All
ZOOM instructions are accessible from programs.
ZOOM MEMORY
1:ZBox Draws a box to define the viewing window.
2:Zoom In Magnifies the graph around the cursor.
3:Zoom Out Views more of a graph around the cursor.
4:ZDecimal Sets @X and @Y to 0.1.
5:ZSquare Sets equal-size pixels on the X and Y axes.
6:ZStandard Sets the standard window variables.
7:ZTrig Sets the built-in trig window variables.
8:ZInteger Sets integer values on the X and Y axes.
9:ZoomStat Sets the values for current stat lists.
0:ZoomFit Fits YMin and YMax between XMin and XMax.
When you select 1:ZBox, 2:Zoom In, or 3:Zoom Out, the
cursor on the graph becomes the zoom cursor (+), a
smaller version of the free-moving cursor (+).
To define a new viewing window using ZBox, follow these
steps.
1. Select 1:ZBox from the ZOOM menu. The zoom cursor is
displayed at the center of the screen.
2. Move the zoom cursor to any spot you want to define as
a corner of the box, and then press Í. When you
move the cursor away from the first defined corner, a
small, square dot indicates the spot.
3. Press |, }, ~, or †. As you move the cursor, the sides
of the box lengthen or shorten proportionately on the
screen.
Note: To cancel ZBox before you press Í, press ‘.
4. When you have defined the box, press Í to replot
the graph.
To use ZBox to define another box within the new graph,
repeat steps 2 through 4. To cancel ZBox, press ‘.
Exploring Graphs with the ZOOM InstructionsZOOM Menu
Zoom Cursor
ZBox