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College Algebra / Unit 5   Alg 299 short lesson, about 20 seconds

Graphs of Inverse Functions

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The idea

The graph of an inverse function is the original graph reflected across the line y = x, because reversing inputs and outputs swaps every point's coordinates.

In practice

The point (4, 11) on f(x) = 2x + 3 lands at (11, 4) on its inverse — coordinates traded, mirror line y = x.

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