# Inverse Cubic function

In this tutorial students will learn how to derive the inverse of a cubic one-to-one function and then verify those results using the TI-84 Plus C.

# Horizontal Line Test

The inverse of a function can only be found when a function is one-to-one. A function is one-to-one when it passes the horizontal line test. The horizontal line test states that for **every** *y* value there is **one unique** *x* value.

# Road map to solving

- Change
**f(x)**to**y**. - Swap
**x**for**y**&**y**for**x**. - Solve for
**y**.

# Explicit Function

# Inverse Function

# Line of Symmetry

# Graphing Tool

Click the link below to see the functions above on an interactive graphing calculator.

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