Education Technology

Solution 11761: Graphing a Circle on a TI Graphing Calculator.

How do I graph a circle on a TI graphing calculator?

Functions can be graphed on TI graphing calculators in the form Y in terms of X. In order to graph a circle, the function for a circle would need to be solved for Y.


To graph the unit circle (x2+y2=1), first, solve for y, and then input the results into the Y= Editor.

If the graph looks like an oval, use the Zoom Square feature followed by Zoom In or Zoom Out to change the viewing window. The graphs will be displayed on a TI-83 Plus family or TI-84 Plus family, TI-89 family, and TI-Nspire family as follows:

Please Note: It is normal on the TI-89 family that the circle will graph and the sides of the circle appear to be missing.

Please see the TI graphing calculator guidebooks for additional information.