Question

A circle is shown on the coordinate plane below.
What is the equation of this circle?

Answer 1

x2 + (y + 1)2 = 4

x2 + (y – 1)2 = 2

x2 + (y + 1)2 = 2

x2 + (y – 1)2 = 4

Answer 2

anyone help me please?

Answer 3

just compare them to the general equation of circle in your last post

Answer 4

answer is c?

Answer 5

no - what is radius of the circle? - check the diagram

Answer 6

radius is 1 correct?

Answer 7

the radius is he distance from the centre of the circle to a point on the circle,
can you find the coordinates of the centre?

Answer 8

0,1 right?

Answer 9

hello are you there?

Answer 10

yes, it is at (0, 1).

Answer 11

so whats my answer?

Answer 12

B?

Answer 13

do you know a point on the circle that has known coordinates? if yes, what is its distance from the center C(0,1)?

Answer 14

is the answer x2 + (y – 1)2 = 2

Answer 15

my choices are above

Answer 16

the center is at (0,1) so the equation of the circle is \[\large (x-0)^2 + (y-(-1))^2=r^2\] that leaves you two choices A or C. you need to compute the radius of the circle.

Answer 17

A

Answer 18

A it is. a point on the circle is (0,3). so the radius is 2