freeCodeCamp/guide/english/mathematics/intro-to-inverse-functions/index.md

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Intro to Inverse Functions

Intro to Inverse Functions

Say you were trying to reflect y=3x over the line y=x. What would be the equation of the line? As you can see in the image below, it would be y=1/3x. But why is that so? If you swap x and y with each other and solve for y, you can find that the equation would be the same. This is what would be called a inverse function.

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More Information:

“How to Graph the Inverse of a Function.” Dummies.com.