$\"\"$

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The parabola is $\"\"$ .

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Take $\"\"$ terms on one side and $\"\"$ terms on other side.

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$\"\"$

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Rewrite the expression.

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$\"\"$

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Add $\"\"$ to each side.

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$\"\"$

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$\"\"$

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Compare the above equation with $\"\"$ .

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$\"\"$ and $\"\"$ .

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Here $\"\"$ is negative then the parabola opens downward.

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The vertex of the parabola is $\"\"$ .

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The focus of the parabola is $\"\"$ .

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The directrix of the parabola is $\"\"$ .

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$\"\"$

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Graph:

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Graph the parabola $\"\"$ .

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$\"\"$

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$\"\"$

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The vertex of the parabola is $\"\"$ .

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The focus of the parabola is $\"\"$ .

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The directrix of the parabola is $\"\"$ .

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Graph the parabola $\"\"$ .

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$\"\"$