Question

Write the equation of the circle centered at (4, - 9) with diameter 16.
HELP A GIRL OUT

Answer 1

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

Explanation:

hey! The formula for the equation of a circle is r^2= (x-h)^2 + (y-k)^2

r= the radius (in your case you have the diameter so you do not need to square it)

(h,k)= is the center coordinates, so your center coordinate would be (4, -9). You now have your h (h=4) and your k (k=-9) so you can plug it in the formula! :)

a nice rating would help out