# horizontal line test

> test for the bijectivity of a function

**Wikidata**: [Q985704](https://www.wikidata.org/wiki/Q985704)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Horizontal_line_test)  
**Source**: https://4ort.xyz/entity/horizontal-line-test


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)