$\"\"$

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The parabola is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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The standard form of parabola equation is $\"\"$ .

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Compare the equation $\"\"$ with stand form.

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Here $\"\"$ 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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Susbtitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ .

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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 of the parabola is : \ \

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$\"\"$ .