TI-83 Plus Parametric Graphing 163
Exploring Parametric Graphs
Free-Moving Cursor
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.
TRACE
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.