Domain and Range
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Domain and Range
Domain and range identify the set of values for which the variables in a function are defined. The domain identifies all possible input values. These input values are often denoted by \(x \) (or some other appropriate independent variable , such as \(n \) from Example 3) and are represented on the \(x\)-axis of the Cartesian coordinate plane . The input values correspond to the first coordinate in the ordered pair \((x, y)\).
The range identifies all possible output values. These output values are often denoted by \(y \) (or some other appropriate dependent variable , such as \(T(n) \) from Example 3) and are represented on the \(y\)-axis of the Cartesian coordinate plane . The output values correspond to the second coordinate in the ordered pair \((x, y)\).