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Anthony Billingsley

The Circle

First know to graph a circle you must write it in the form of (x-h)^2 +(y-k)^2=r^2 Now in its new form we seek the center (h,k).
Remember that (-h,-k)`s signs will always be the opposite from their position in the equation. (x-h)^2 +(y-k)^2=r^2
r^2 simply the radius squared.
Graphing the circle. center: (h,k) radius:r^2 (h) will represent (x) and (k) will represent (y).Radius will circle around the point (h,k). plot (h,k) on to the (x,y)graph.Then for radius what ever the radius may be you must move that amount from the center, in all for main directions of the graph.
All information covered can be found in Unit 4: Quadratic Equations and Functions, Module 20: The Circle.
Created by: ajajaj