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Give the equation of each circle below in graphing form. .

  1. A circle with center and radius .

    Remember the general equation for a circle is  where is the center.

  2. A circle with center and radius .

    See part (a).

  3. A circle with equation .

    Complete the squares for and .

    Rearrange the equation:
    _______ _______ _______ _______

Use the eTool below to graph the equations for each part.
Click the link at right for the full version of the eTool: CCA2 3-54 HW eTool