Example

Example: Finding the Inverse of the Function {(0,3),(1,5),(2,7),(3,9)}\{(0,3),(1,5),(2,7),(3,9)\}

Find the inverse of the function {(0,3),(1,5),(2,7),(3,9)}\{(0, 3), (1, 5), (2, 7), (3, 9)\} and determine the domain and range of the inverse.

First, confirm that the function is one-to-one: every xx-value is paired with exactly one yy-value, and no yy-value is repeated.

To find the inverse, reverse the xx- and yy-values in each ordered pair:

Ordered Pairs
Function{(0,3),(1,5),(2,7),(3,9)}\{(0, 3), (1, 5), (2, 7), (3, 9)\}
Inverse Function{(3,0),(5,1),(7,2),(9,3)}\{(3, 0), (5, 1), (7, 2), (9, 3)\}

The domain of the inverse function is the set of all its xx-values: {3,5,7,9}\{3, 5, 7, 9\}. The range of the inverse function is the set of all its yy-values: {0,1,2,3}\{0, 1, 2, 3\}.

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Updated 2026-05-25

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