Keep careful track of your negative values, remembering that, ultimately, the expressions must all be positive (because your x-values and y-values are squared). If precision matters, use a ruler to make additional marks, or a drawing compass to swing the complete circle. The equation for the best-fit line is (1.1) y m x + b where (1.2) b y -intercept (1.3) m slope (1.4) y x (1.
If precision is not vital, you can sketch in the rest of the circle. Place the easily counted values along the x and y axes, by simply counting the radius length along the horizontal and vertical lines. So, when actually graphing your circle, mark your center point very lightly. In practical terms, remember that the center point, while needed, is not actually part of the circle. You can plug the values in to find this circle with center point (-4, 3) and a radius of 5.385 units (the square root of 29): Graphing a circle in standard form Cautions to look out for You now have the center-radius form for the graph.
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