Texas Instruments -84 Plus, Manual Book

Page: 118 / 696

Chapter 3: Function Graphing 115
Exploring Graphs with TRACE Exploring Graphs with TRACE Exploring Graphs with TRACE Exploring Graphs with TRACE
Beginning a Trace
Beginning a Trace Beginning a Trace
Beginning a Trace
Use TRACE to move the cursor from one plotted point to the next along a function. To
begin a trace, press
r
. If the graph is not displayed already, press
r
to display
it. The trace cursor is on the first selected function in the Y= editor, at the middle X value
on the screen. The cursor coordinates are displayed at the bottom of the screen if
CoordOn
format is selected. The Y= expression is displayed in the top-left corner of the
screen, if
ExprOn
format is selected.
Moving the Trace Cursor
Moving the Trace Cursor Moving the Trace Cursor
Moving the Trace Cursor
When the trace cursor moves along a function, the Y value is calculated from the X
value; that is,
Y=Y n (X)
. If the function is undefined at an X value, the Y value is blank.
To move the TRACE cursor do this:
To the previous or next plotted point,
press
|
or
~
.
Five plotted points on a function ( Xres
affects this),
press
y |
or
y ~
.
To any valid X value on a function,
enter a value, and then press
Í
.
From one function to another,
press
}
or
†
.