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# Unit 2

TermDefinition
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 only contains an equals symbols
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.
Created by: ChsTrump