Math 4 Unit 2 Functions Test Class 2A Makeup

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What does the r² value represent in linear regression?

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The r² value indicates the proportion of variance in the dependent variable that can be explained by the independent variable(s).

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4.6

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Define a function in mathematics.

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A function is a relation that assigns exactly one output for each input from a given set.

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What is the difference between a linear function and a quadratic function?

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What is the vertex of a quadratic function?

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The vertex is the highest or lowest point of the parabola represented by the quadratic function.

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How do you find the x-intercepts of a quadratic function?

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Set the function equal to zero and solve for x.

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What is the significance of the leading coefficient in a quadratic function?

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The leading coefficient determines the direction of the parabola: if positive, it opens upwards; if negative, it opens downwards.