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2.1 Vocabulary
Relations and Functions
Term | Definition |
---|---|
Relation | a set of pairs of input and output values |
Domain | the set of all inputs; x-values |
Range | the set of all outputs; y-values |
Function | a relation in which each element of the domain corresponds with exactly one element of the range |
Vertical-line test | if a vertical line passes through more than one point on the graph of a relation, then the relation is not a function |
Function Rule | an equation that represents an output value in terms of an input value |
Function Notation | f(x) , read as "f of x" or "function of x" |
Independent Variable | x; represents the input of the function |
Dependent Variable | y; represents the output of the function |