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1 April, 11:20

What is the equation of a circle with a center located at (4,-1) and a radius of 9

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  1. 1 April, 11:24
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    The equation for a circle with the given information would be (x - 4) ^2 + (y + 1) ^2 = 81.

    This is because the base form of a circle is:

    (x - x1) ^2 + (y - y1) ^2 = r^2

    In which, x1 is the x coordinate of the center and y1 is the y coordinate of the center. r is the radius of the circle. So we plug in to those and simplify.

    (x - 4) ^2 + (y - - 1) ^2 = 9^2

    (x - 4) ^2 + (y + 1) ^2 = 81
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