$\"\"$

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The equation is $\"\"$ .

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Multiply each side by $\"\"$ . \ \

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$\"\"$

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To find the rectangular form of this equation replace $\"\"$ with $\"\"$ and $\"\"$ with $\"\"$ .

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Since $\"\"$ , the equation can be written as $\"\"$ .

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$\"\"$

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Add $\"\"$ on both sides to make a perfect square.

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$\"\"$

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The graph of this equation is a circle centered at $\"\"$ with radius $\"\"$ . $\"\"$

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Evaluate the function for several values of $\"\"$ in its domain and use this points to graph the function.

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(1) Draw the coordinate plane.

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(2) Graph the function $\"\"$ .

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Graph :

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$\"\"$

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$\"\"$

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The rectangular equation is $\"\"$ .

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Graph :

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$\"\"$