Algebra 1 9.3 Graphing f(x)=ax2 + bx + c

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(-6.12,-12.5)

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(1,-3)

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What is the standard form of a quadratic function?

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The direction of the parabola: if a > 0, it opens upwards; if a < 0, it opens downwards.

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How do you find the vertex of a quadratic function in standard form?

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What is the range of a quadratic function that opens upwards?

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The range is from the vertex's y-coordinate to infinity.

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What is the range of a quadratic function that opens downwards?

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The range is from negative infinity to the vertex's y-coordinate.