Parametric Graphing 351
Note: During a trace, you can also evaluate x(t) and y(t) by typing the t value and
pressing ¸. You can use QuickCenter at any time during a trace, even if the cursor is
still on the screen.
Tool For Parametric Graphs:
Free-Moving
Cursor
Works just as it does for function graphs.
„ Zoom
Works just as it does for function graphs, with the
following exceptions:
•Only x (xmin, xmax, xscl) and y (ymin, ymax, yscl)
Window variables are affected.
• The
t Window variables (tmin, tmax, tstep) are not
affected unless you select
6:ZoomStd (which sets
tmin = 0, tmax = 2p, and tstep = p/24).
… Trace
Lets you move the cursor along a graph one tstep at a
time.
• When you begin a trace, the cursor is on the first
selected parametric equation at
tmin.
• QuickCenter applies to all directions. If you move the
cursor off the screen (top or bottom, left or right), press
¸ to center the viewing window on the cursor
location.
• Automatic panning is not available. If you move the
cursor off the left or right side of the screen, the
Voyage™ 200 will not automatically pan the viewing
window. However, you can use QuickCenter.
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