Math 4 Unit 2 Functions Test Class 1B Makeup

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Front

What does the r² value represent in a quadratic regression equation?

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The r² value indicates the proportion of the variance for a dependent variable that's explained by an independent variable or variables in a regression model.

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Front

If Joe earned $400, how many hours did he work if the graph indicates a linear relationship?

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Joe worked 25 hours.

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What is a function in mathematics?

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

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Define 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 vertex of a quadratic function in standard form?

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What is the significance of the y-intercept in a function?

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The y-intercept is the point where the graph of the function crosses the y-axis, indicating the output when the input is zero.