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Unit 3 Pre-Algebra
Functions and Graphs
Term | Definition |
---|---|
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. |