A line that intersects two or more lines. Transversal

A collection of objects or elements Set

A letter that represents a value that can change or vary. Variable

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs. Pythagorean Theorem

A way to show all the possible outcomes. Tree Diagram

The set containing all the elements of both sets. Union

A method of writing very large or very small numbers by using powers of 10. Scientific Notation

The type of a change a line makes and the rate it moves. Rate of Change

A function whose graph is a straight line. Linear Function

An ordered list of numbers. Sequence

The value of x and y where the line crosses the axis. Intercept

The opposite of a number Additive Inverse

An equation whose solutions form a straight line on the coordinate plane. Linear Equation

The set containing the elements that are common to both sets. Intersection

The set of all elements not in the original set. Complement

An object in a set. Element

A set contained within another set. Subset

A mathematical sentence using >,, or,, or < whose graph is a region with a straight- line boundary. Linear Inequality

An ordered list of numbers in which the difference between consecutive terms is the same. Arithmetic Sequence

Repeating Recursive

Shows relationships among sets using circles to represent each set. Venn Diagram

If there are m ways to choose the first item and n ways to choose the second after the first has been chosen, then there are m · n ways to choose all items. Fundamental Counting Principle

A number from 0 to 1 that describes how likely and event is to occur. Probability

One of two equal factors of a number. Square Root

Any number that can be expressed as a ratio of two integers. Rational Number

A mathematical sentence that shows the relationship between quantities that are not equivalent. Inequality

The reciprocal of a number. Multiplicative Inverse

A measure of the steepness of a line on a graph. Slope

A straight line that comes closest to the points on a scatter plot. Line of best fit

A pairing between two sets of numbers. Relation

A set of two or more linear equations that contain two or more variables. System of linear equations

Two or more terms that have the same variable raised to the same power. Like terms

The symbol used to represent the nonnegative square root of a number. Radical

A number that indicates how many times a base is used as a factor. Exponent

A number that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal. Irrational Number

All digits that are known with certainty. Significant Digits

An input-output relationship that has exactly one output for each input. Function

If one group contains m objects and a second group contains n objects, and the groups have no objects in common, then there are m + n total objects to choose from. Addition Counting Principle