Question

Write the equation of a circle with the following parameters:
Center at x = -9, y = -10
Diameter = 10

Answer 1

I have given you the equation of a circle in your previous question. If you keep copying down the answers from the website without understanding anything, you will never learn.

Answer 2

What don't you understand about how to do it and maybe we can help you

Answer 3

I just dont understand any of it

Answer 4

The equation of a circle is
\[(x-a)^2 + (y-b)^2 = r^2\]
where (a,b) is the centre of the circle and r is the radius. What is not clear?

Answer 5

So choose C.???

Answer 6

I mean D.

Answer 7

So for example
\[(x-1)^2 + (y-2)^2 = 4\] is a circle with the centre at (1,2) and radius 2

Answer 8

Do you know how diameter is related to the radius?

Answer 9

No i dont