Help difficult question

Question

zarkam21 · Answer

attachment

mathstudent55 · Answer

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mathstudent55 · Answer

The equation of the circle with center $(h, k)$ and radius $r$ is

$(x - h)^2 + (y - k)^2 = r^2$

mathstudent55 · Answer

Look at each choice and fit it into the equation of the circle above.
What points do you get for the centers of the circles?

zarkam21 · Answer

Yes I know that

zarkam21 · Answer

I dont know what they mean by have their centers

mathstudent55 · Answer

Then once you know the centers, the ones with a negative x-coordinate and a positive y-coordinate are in quadrant 2.

mathstudent55 · Answer

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mathstudent55 · Answer

Sorry, but gtg. I'll be back later.

agent0smith · Answer

Look at his post that gives the equation and center of the circle.

Eg (x - 2)^2 + (y + 7)^2 = 16

has center (2, -7)

agent0smith · Answer

Work out the center of all the circles.

zarkam21 · Answer

OKay so 

A. (5,6)
B. (-2,5)
C. (-1,7)
D. (4,-3)

agent0smith · Answer

Yep. Now either plot the points, or just look at them to work out what quadrant.

zarkam21 · Answer

Hey, but I don't understand what the question is asking by quadrant

agent0smith · Answer

Mathstudent gave diagrams earlier

zarkam21 · Answer

COuld you explain further, I'm not getting what to do what the points

agent0smith · Answer

agent0smith · Answer

Plot them. See which quadrant they are in.

zarkam21 · Answer

Okay B?

agent0smith · Answer

Just list them all on here, write quadrant 2 beside the ones that are.

A. (5,6)
B. (-2,5)
C. (-1,7)
D. (4,-3)

zarkam21 · Answer

A. (5,6)
B. (-2,5) 2ND 
C. (-1,7) 2ND
D. (4,-3)

agent0smith · Answer

Yep