Adding Circle Layers

Graph of a circle on a coordinate plane. The circle is centered at the origin (0, 0) and has a radius of 3. The x-axis is labeled "X" and goes from -10 to 10. The y-axis is labeled "Y" and goes from -10 to 10.

To add a circle to a Cartesian graph:

Insert a Cartesian graph or edit an existing graph by double-clicking it. The Cartesian Graph dialog box opens.
In the Layers section, click Add.
Select Circle in the Add Cartesian Layer dialog box and then click OK.
Enter the radius of the circle in the r field.
Specify the location of the center of circle by entering the x coordinate in the a field and the y coordinate in the b field. By default, the center is placed at (0,0).
Select a Line Style for the line.
Select a Line Color.

Select a Relation to specify how shading is applied to the graph.

Relation	Shading
=	The outline of the figure is shaded.
<	The area within the figure is shaded.
<=	The outline and the area within the figure is shaded.
>	The area outside the figure is shaded.
>=	The outline and area outside the figure is shaded.

Click Fill Color to specify the color of the shaded area of the graph.
Click Fill Shading to specify the pattern applied to the shaded area of the graph.
If you want the layer to display only if a certain condition is met, enter an equation or a variable that evaluates to true or false into the Show if field. .

Note: When entering variables, enclose the variable name in two opening and two closing number signs (for example, ##var1## = 3). The variable you reference must be defined for the question or the preface associated with the question.
Click OK.