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Unit 3 Pre-Algebra

Functions and Graphs

Relation A pairing of numbers. It is often written as a set of ordered pairs.
Range The set of the y-values of the relation (input)
Domain The set of the x-values of the relation (output)
Function A relation where every domain value is mapped to only one range value.
Independent Variable Sometimes called the "control" variable. This variable changes independently from the dependent variable (the x-variable)
Dependent Variable This variable depends on the independent variable in order to change (the y-variable)
Absolute Value of a Number The distance that a number is away from zero on the number line.
Direct Variation A relationship between two variable quantities that have the same constant ratio.
Slope A measure of "steepness". It is measured by taking the ratio of the change in y and the change of x between two points.
Created by: esisolak