How to Graph Several Parametric Equations on the TI-83 Plus
To identify the graphs of several pairs of parametric equations, set a different graph style for each pair of parametric equations on the TI-83 Plus graphing calculator. The following steps show how:
Press [Y=] to access the Y= editor.
keys to place the cursor on the icon appearing at the very left of the definition of the first parametric equation in the pair of parametric equations.
Repeatedly press [ENTER] until you get the desired graph style.
You have five styles to choose from: Line, Thick Line, Path, Animate, and Dotted Line. Each time you press [ENTER], you get a different style. The Path style uses a circle to indicate a point as it’s being graphed, and when the graph is complete, the circle disappears and leaves the graph in Line style.
The Animate style also uses a circle to indicate a point as it’s being graphed, but when the graph is complete, no graph appears on-screen.
The most common styles used to graph parametric equations are Line, Thick Line, and Dotted Line.
If you don’t want the calculator to graph a pair of parametric equations, unhighlight the equal signs in that pair. To graph it at a later time, rehighlight the equal signs. You can do so in the Y= editor by using the
keys to place the cursor on the equal sign in the definition of either parametric equation in the pair, and then pressing [ENTER] to toggle the equal sign between highlighted and un-highlighted.