$\"\"$

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The function is $\"\"$ .

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The standard form of quadratic function is $\"\"$ .

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Find the axis of symmetry:

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Formula for the equation of the axis of symmetry: $\"\"$ .

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The value of $\"\"$ are substitute in the formula, $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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The equation for the axis of symmetry is $\"\"$ . $\"\"$

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Find the vertex:

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To find the vertex, use the value of equation for the axis of symmetry as the x - coordinate of the vertex.

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To find the y - coordinate, substitute the value of $\"\"$ in the original equation, $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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The vertex point is $\"\"$ . $\"\"$

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Find the y-intercept:

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To find the y - intercept, the value of $\"\"$ substitute in the original equation, $\"\"$ .

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$\"\"$

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$\"\"$

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The y - intercept is $\"\"$ . $\"\"$

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The vertex of the function is $\"\"$ , the equation for the axis of symmetry is $\"\"$ and its y - intercept is $\"\"$ .