Question

I knew the answer before.. but

Answer 1

you need to learn (memorize) the equation of a circle
that has a center at (h,k) and has radius r

this equation is
\[ (x-h)^2 + (y-k)^2 = r^2 \]

Answer 2

to find (h,k), look at the graph and find the coordinates of the center
can you do that ?

Answer 3

Yes, I sure can.

Answer 4

then use those numbers in the equation. And be careful of the minus signs.

to find r, start at the center and count sideways. How many steps is that ?

then use r^2 (i.e. r*r) in the formula

Answer 5

There are 4. r=4

Answer 6

the formula uses r^2 = 16
so do you now know the equation for this circle ?

Answer 7

What does h and k represent for this problem?

Answer 8

(h,k) is the (x,y) coordinates of the center.

what is the (x,y) coordinates of the center of the circle ?

Answer 9

(4,1)

Answer 10

Would it be the second one?

Answer 11

the center is not at (4,1)

start at (0,0) and count steps to the right, then down
(the down part will make the y value negative)

Answer 12

It'll be 4 going to the right.

Answer 13

Are we trying to count to the dot?

Answer 14

I meant point**

Answer 15

Here is how to count it over to E. Then 1 step down

Answer 16

4 steps is 1 too many to the right

Answer 17

Sory, about that I've been up since 6 A.M.

Answer 18

Sorry*

Answer 19

you should find E at (3,-1)
3 over to the right, then 1 step down.

that means h=3 and k= -1
use those numbers in the equation.