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12-48.

A circle with its center on the line in the first quadrant is tangent to the ‑axis. 12-48 HW eTool (Desmos)  Homework Help ✎

  1. If the radius is , what is the equation of the circle?

    What point on the line is units from the -axis?

    Use the coordinates of the center and the radius to write an equation in general form.

  2. If the radius is , what is the equation of the circle?

    See part (a).

    Use the eTool below for help with this problem.
    Click on the link at right for the full eTool version: Int3 12-48 HW eTool