Unit 2 Review- Making Sense of It All

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Mean

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The mean of a set of numbers is found by adding all of the numbers, then dividing by how many numbers there are in the list.

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Median

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The median of a list of numbers is the value that lives right in the middle of the set if it’s arranged in order.

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Mode

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The mode of a list of numbers is the value that appears most often.

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Variable

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A variable is a quantity that is able to change, or vary.

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Constant

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A constant is a quantity that can’t vary.

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Dependent Variable

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Course grade is an example of a dependent variable because other factors cause your course grade to vary.

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Independent Variable

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The amount of time you spend studying is an example of an independent variable because it can change and cause changes in your course grade.

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Expression

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An expression is a combination of variables and constants using mathematical operations and grouping symbols.

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Equation

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An equation is a statement that two quantities are equal, built using expressions and an equal sign (=).

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Formula

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A formula is an equation with multiple variables that is used to calculate some quantity that we’re interested in.