Texas Instruments TI-80 User Manual - Page 98
Exploring a Parametric Graph, screen, the coordinate values continue to change
View all Texas Instruments TI-80 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 98 highlights
Exploring a Parametric Graph As in function graphing, three tools are available for exploring a graph: the freemoving cursor, tracing, and zooming. Free-Moving Cursor Tracing a Parametric Graph 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 Moves the cursor one TSTEP at a time. Moves the cursor five TSTEPs at a time. Changes to the previous or next equation. The equation number shows in the upper right of the display. Cancels tracing. Zooming in on a Parametric Graph For each value of T, the calculator displays values for X and Y. The values for X, Y, and T are updated as you move the Trace 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 TSTEP. These variables are not affected by zooming unless you select ZSTANDARD, where TMIN = 0, TMAX = 6.283185307 (2p), and TSTEP = .1308996938996 (p/24). 5-6 Parametric Graphing