Exploring A Parametric Graph - Texas Instruments TI-80 Manual Book

Exploring a Parametric Graph

As in function graphing, three tools are available for exploring a graph: the free-
moving cursor, tracing, and zooming.
Free-Moving
Cursor
Tracing a
Parametric
Graph
Zooming in on a
Parametric
Graph
5-6 Parametric Graphing
The free-moving cursor works the same in parametric
graphing as in function graphing (page 4-12).
Pressing + puts the Trace cursor on the first selected
equation, at TMIN . You can then trace along the equation.
6 or 9
2 6 or 9 ~
7 or 8
M
For each value of
The values for X , Y
cursor. If the cursor moves off the top or bottom of the
screen, the coordinate values continue to change
appropriately.
The Trace cursor remains in the same location if you leave
TRACE and return, unless Smart Graph replots the graph.
QuickZoom is available in parametric graphing, but panning is
not (page 4-13).
Pressing * works the same in parametric graphing as in
function graphing (page 4-15).
Parametric graphing uses the additional Window variables
TMIN , TMAX , and
zooming unless you select
TMAX = 6.283185307 (2p), and
(p/24).
Moves the cursor one
Moves the cursor five
Changes to the previous or next equation.
The equation number shows in the upper
right of the display.
Cancels tracing.
T , the calculator displays values for
, and T are updated as you move the Trace
TSTEP . These variables are not affected by
ZSTANDARD
TSTEP
TSTEP at a time.
TSTEP s at a time.
X and
, where TMIN = 0,
= .1308996938996
Y
.