Trigonometry Inverse Trigonometric Functions
Inverse Functions Interactive Example 1

Given: f(x) = ax+b. Find: formula for f -1(x).

a = |
b = |

1. | y | = |  |  | Write y instead of f(x).
2. | x | = |  |  | Interchange x and y.
3. |  | = | x |  | Solve the equation x = f(y) for y.
|  | = |  |  |
4. | f-1(x) | = |  |  | Write f -1(x) instead of y.

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