Grade 8 Mathematics Vocabulary

Front

A mathematical expression that contains one or more variables. For example: 4x + 3

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Algebraic Expression

Front

A letter or symbol that represents a missing number or unknown value. Generally, the letter is lowercase and italicized.

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Variable

Front

A mathematical relationship between two variables that can be represented by a straight line. For example, the distance traveled (d) over a constant speed (s) can be represented by the function: d = 60s

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Linear Function (Linear Relationship)

Front

A singular line created on a scatter plot to best estimate the relationship between the two sets of data. The line is used to describe the trend of the data, illustrating a positive or negative correlation.

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Line of Best Fit

Front

Terms that have the same variable and exponent factors. These type of terms can be combined.

Back

Like Terms

Front

A number that is multiplied by a variable in an algebraic expression.

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Coefficient

Front

An expression that represents the division of one quantity by another, often written as a fraction.

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Rational Expression

Front

A mathematical statement that two expressions are equal, often containing an equal sign (=).

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Equation

Front

A number that is raised to a power in an expression, indicating how many times to multiply the base by itself.

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Exponent

Front

A mathematical operation that combines two or more numbers to produce a sum.

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Addition