Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 103

TRACE
To activate TRACE, press r. When TRACE is active, you can move the trace cursor along
the graph of the equation one
first selected function at
In format, TRACE updates and displays the values of X, Y, and T if
RectGC
In format, X, Y, R, q and T are updated; if
PolarGC
displayed. The X and Y (or R and q) values are calculated from T.
To move five plotted points at a time on a function, press y | or y ~. If you move the cursor
beyond the top or bottom of the screen, the coordinate values at the bottom of the screen continue
to change appropriately.
Quick Zoom is available in parametric graphing; panning is not.
Moving the Trace Cursor to Any Valid T Value
To move the trace cursor to any valid
enter the first digit, a
T=
corner of the screen. You can enter an expression at the
the current viewing window. When you have completed the entry, press Í to move the cursor.
ZOOM
operations in parametric graphing work the same as in Func graphing. Only the
ZOOM
, and ) and
Xmax Xscl Y
The window variables (
T
secondary menu ZT/Zq items
VARS ZOOM
variables for parametric graphing.
CALC
operations in parametric graphing work the same as in Func graphing. The
CALC
menu items available in parametric graphing are
at a time. When you begin a trace, the trace cursor is on the
Tstep
. If is selected, then the function is displayed.
Tmin ExprOn
value on the current function, enter the number. When you
T
prompt and the number you entered are displayed in the bottom-left
( , , and
Ymin Ymax Yscl
, , and
Tmin Tmax Tstep
1:ZTmin
format is selected, R, q, and T are
CoordOn
prompt. The value must be valid for
T=
) window variables are affected.
) are only affected when you select
, , and
2:ZTmax 3:ZTstep
, ,
1:value 2:dy/dx 3:dy/dt
Chapter 4: Parametric Graphing
format is on.
CoordOn
(
X Xmin
. The
ZStandard
are the zoom memory
CALCULATE
, and .
4:dx/dt
,
96