Question

find the center and the radius for the following: (x –9)^2+(y+3)^2=64

Answer 1

do you know the general equation for a circle? It follows an easy rule. If the center is at some point (a,b), then the equation looks like \[(x-a)^2+(y-b)^2\] and the radius is just the square root of the number on the right side.

Answer 2

Does that make sense? Or are you still confused?

Answer 3

@caseyrt you should also add in the r^2 at the end of the equation too xD

Answer 4

you're right, but I didn't want to throw in something new before I had the chance to explain it.