Domain & Range Quadratics

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What is the DOMAIN of a quadratic function?

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What is the RANGE of a quadratic function?

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What variable typically represents the DOMAIN in a function?

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The variable that typically represents the domain in a function is x.

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What variable typically represents the RANGE in a function?

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The variable that typically represents the range in a function is y.

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How do you determine the domain of a quadratic function?

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To determine the domain of a quadratic function, identify the x-values that can be input into the function. For most quadratics, the domain is all real numbers.

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How do you determine the range of a quadratic function?

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To determine the range of a quadratic function, find the vertex and the direction the parabola opens. The range will be all y-values from the vertex to infinity or negative infinity.

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What is the vertex of a quadratic function?

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

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What does it mean if a quadratic function opens upwards?

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If a quadratic function opens upwards, it means that the parabola has a minimum point (the vertex) and the range is from the vertex to infinity.

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What does it mean if a quadratic function opens downwards?

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If a quadratic function opens downwards, it means that the parabola has a maximum point (the vertex) and the range is from negative infinity to the vertex.

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What is the standard form of a quadratic function?

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