Unit 4 Review

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What is a quadratic inequality?

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How do you determine the solution set of a quadratic inequality?

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To determine the solution set, first find the roots of the corresponding quadratic equation, then test intervals between the roots to see where the inequality holds true.

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What does the graph of a quadratic function look like?

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The graph of a quadratic function is a parabola, which can open upwards or downwards depending on the sign of the leading coefficient.

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What is the vertex of a parabola?

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The vertex of a parabola is the highest or lowest point on the graph, depending on whether it opens downwards or upwards.

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

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The range is all values of y greater than or equal to the y-coordinate of the vertex.

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

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The range is all values of y less than or equal to the y-coordinate of the vertex.

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How do you find the maximum or minimum value of a quadratic function?

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What is the significance of the discriminant in a quadratic equation?

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