Texas Instruments TI-84 - Manual (Page 141)

Chapter 4: Parametric Graphing 138
Defining and Editing Parametric Equations Defining and Editing Parametric Equations Defining and Editing Parametric Equations Defining and Editing Parametric Equations
To define or edit a parametric equation, follow the steps in Chapter 3 for defining a
function or editing a function. The independent variable in a parametric equation is T. In
Par graphing mode, you can enter the parametric variable T in either of two ways.
• Press
„.
• Press
ƒ [
T ].
Two components, X and Y, define a single parametric equation. You must define both of
them.
Selecting and Deselecting Parametric Equations Selecting and Deselecting Parametric Equations Selecting and Deselecting Parametric Equations Selecting and Deselecting Parametric Equations
The TI-84 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.