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Which is the standard form of the circle with center (6,-1) and radius 7

1 Answer

4 votes

Answer:

( x − 6)^2 + ( y + 1) )^2 =49

Explanation:

The standard form for a circle is ( x − h )^2 + ( y − k )^2 = r ^2

Lets take this apart. (h, k) stand for the center coordinates and r stands for the radius.

Plug that in.

( x − (6) )^2 + ( y − (-1) )^2 = (7) ^2

Since the negative 1 is being subtracted, it cancels out and becomes positive. 7 squared is 7 * 7 which is 49.

( x − 6)^2 + ( y + 1) )^2 =49

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User Uselpa
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