SOLUTION: Hello there, I have a project due monday about graphing circles using my ti-83. there are four assingment and the 1st of four is to graph a few concetric circles with an origin of

Question 581859: Hello there, I have a project due monday about graphing circles using my ti-83.
there are four assingment and the 1st of four is to graph a few concetric circles with an origin of (0,0).
I must write my equations in (x+h) squared + (y-K) squared = radius squared.
but then I must solve for y
. what i dont understand is how to solve for y
please give me an example on how to do this problem then i can do the rest on my own. Thanks
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
A circle with radius r, centered at point (h,k) has the equation

Your circles, centered at (0,0) will have the equation

For a radius of 2, since , the equation would be

Solving for y, you will get two functions, representing the top half of the circle, and the bottom half of the circle.
-->
Then for the top half

and for the bottom half

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