TI-83 Plus Parametric Graphing 160
Selecting and Deselecting Parametric Equations
The TI-83 Plus graphs only the selected parametric equations. In the Y=
editor, a parametric equation is selected when the = signs of both the
X and Y components are highlighted. You may select any or all of the
equations X1T and Y1T through X6T and Y6T.
To change the selection status, move the cursor onto the = sign of either
the X or Y component and press Í. The status of both the X and Y
components is changed.
Setting Window Variables
To display the window variable values, press p. These variables
define the viewing window. The values below are defaults for Par
graphing in Radian angle mode.
Tmin=0 Smallest T value to evaluate
Tmax=6.2831853... Largest T value to evaluate (2p)
Tstep=.1308996... T value increment (pà24)
Xmin=L10 Smallest X value to be displayed
Xmax=10 Largest X value to be displayed
Xscl=1 Spacing between the X tick marks
Ymin=L10 Smallest Y value to be displayed
Ymax=10 Largest Y value to be displayed
Yscl=1 Spacing between the Y tick marks
Note: To ensure that sufficient points are plotted, you may want to change the T
window variables.