IXL - Find inverse functions and relations (Algebra 1 practice)

The graph below shows a function. Is its inverse also a function?

yes

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Learn with an example

The graph below shows a function. Is its inverse also a function?

yes

Horizontal line test

If a horizontal line intersects a function in more than one point, then its inverse is not a function.

If no horizontal line intersects the function in more than one point, then its inverse is a function.

Since there is no horizontal line that intersects the function in more than one point, its inverse is a function.

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