math

Find an equation for the circle that has center (-1, 4) and passes through the point (3, -2).

(x - ? )2 + (y - ? )2 = ?

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asked by Carol
  1. How far apart are the two points? That will be r.

    As you know, the circle with center at (h,k) with radius r is

    (x-h)^2 + (y-k)^2 = r^2

    Now just plug in your numbers.

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  2. thats the only info given

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    posted by Carol
  3. Can you not find the distance between two points?

    They have given you (h,k). All you need is r.

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