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| Algebra | The branch of mathematics that deals with relationships between numbers, utilizing letters and other symbols to represent specific sets of numbers, or to describe a pattern of relationships between numbers. |
| Arithmetic Sequence | A sequence of numbers in which the difference between any two consecutive terms is the same. |
| Average Rate of Change | The change in the value of a quantity by the elapsed time. For a function, this is the change in the y-value divided by the change in the x-value for two distinct points on the graph. |
| Coefficient | A number multiplied by a variable in an algebraic expression. |
| Constant Rate of Change | With respect to the variable x of a linear function y = f(x), the constant rate of change is the slope of its graph. |
| Continuous | Describes a connected set of numbers, such as an interval. |
| Discrete | A set with elements that are disconnected. |
| Domain | The set of x-coordinates of the set of points on a graph; the set of x-coordinates of a given set of ordered pairs. The value that is the input in a function or relation. |
| End Behaviors | The appearance of a graph as it is followed farther and farther in either direction. |
| Equation | A number sentence that contains an equals symbol. |
| Explicit Formula | A formula that allows direct computation of any term for a sequence a1, a2, a3, . . . , an, . . . . |
| Expression | A mathematical phrase involving at least one variable and sometimes numbers and operation symbols. |
| Expression | Any mathematical calculation or formula combining numbers and/or variables using sums, differences, products, quotients including fractions, exponents, roots, logarithms, functions, or other mathematical operations. |
| Factor | For any number x, the numbers that can be evenly divided into x are called factors of x. For example, the number 20 has the factors 1, 2, 4, 5, 10, and 20. |
| Inequality | Any mathematical sentence that contains the symbols > (greater than), < (less than), ? (less than or equal to), or ? (greater than or equal to). |
| Interval Notation | A notation representing an interval as a pair of numbers. The numbers are the endpoints of the interval. Parentheses and/or brackets are used to show whether the endpoints are excluded or included. |
| Linear Function | A function with a constant rate of change and a straight line graph. |
| Linear Model | A linear function representing real-world phenomena. The model also represents patterns found in graphs and/or data. |
| Ordered Pair | A pair of numbers, (x, y), that indicate the position of a point on a Cartesian plane. |
| Parameter | The independent variable or variables in a system of equations with more than one dependent variable. |
| Range | The set of all possible outputs of a function. |
| Recursive Formula | A formula that requires the computation of all previous terms to find the value of an. |
| Slope | The ratio of the vertical and horizontal changes between two points on a surface or a line. |
| Substitution | To replace one element of a mathematical equation or expression with another. |
| Term | A value in a sequence--the first value in a sequence is the 1st term, the second value is the 2nd term, and so on; a term is also any of the monomials that make up a polynomial. |
| Variable | A letter or symbol used to represent a number. |
| X-intercept | The point where a line meets or crosses the x-axis |
| Y-intercept | The point where a line meets or crosses the y-axis |
