Learn how to use the Horizontal Line Test to see if the inverse of a graph is a function in this free math video tutorial by Mario's Math Tutoring.

0:03 What Does the Horizontal Line Test?
0:13 Example 1 Checking if the Inverse is a Function
0:52 Example 2
1:07 Example 3
1:26 What Does the Graph of an Inverse Function Look Like

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