You know from the text that the graph of the equation x2
Chapter 1, Problem 75(choose chapter or problem)
You know from the text that the graph of the equation x2 y2 9 is a circle with center (0, 0) and radius 3. In Exercises 75 81, use a graphing utility to investigate what happens when the equation is changed slightly. (As in graphing circles, youll first need to solve the given equations for y.)
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