user manual

Parametric Graphing 4-7
8304PARA.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:17 PM Printed: 02/19/01 1:36
PM Page 7 of 8
The free-moving cursor in Par graphing works the same as
in
Func graphing.
In
RectGC format, moving the cursor updates the values of
X and Y; if CoordOn format is selected, X and Y are
displayed.
In
PolarGC format, X, Y, R, and
q
are updated; if CoordOn
format is selected, R and
q
are displayed.
To activate
TRACE
, press
r
. When
TRACE
is active,
you can move the trace cursor along the graph of the
equation one
Tstep at a time. When you begin a trace, the
trace cursor is on the first selected function at
Tmin. If
ExprOn is selected, then the function is displayed.
In
RectGC format,
TRACE
updates and displays the values
of
X, Y, and T if CoordOn format is on.
In
PolarGC format, X, Y, R,
q
and T are updated; if CoordOn
format is selected, R,
q
, and T are 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
Par graphing; panning is not
(Chapter 3).
Exploring Parametric Graphs
Free-Moving
Cursor
TRACE