Question

The center of a circle is at (4, -1) and it has a radius of 6. What is the equation of the circle?

Answer 1

the equation of a circle with center (a,b) and radius r is
\[(x-a)^2 + (y-b)^2 = r^2\]
can you apply this ?

Answer 2

(4 - a) + (-1 + b)^2 =6^2 ?

Answer 3

keep the x and y

Answer 4

(x + 4) + (y - 1 )^2 =36

Answer 5

if a=4 , -a = ?

Answer 6

so just -4 instead of positive?

Answer 7

you have to check the -1 also

Answer 8

and the -1 is a +1 ?

Answer 9

correct