Meaning of the word "rational function" in English

What does "rational function" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

rational function

US /ˈræʃ.ən.əl ˈfʌŋk.ʃən/
UK /ˈræʃ.ən.əl ˈfʌŋk.ʃən/
"rational function" picture

Noun

a function that can be expressed as the ratio of two polynomial functions

Example:
The graph of a rational function often has vertical and horizontal asymptotes.
To simplify a rational function, you should factor both the numerator and the denominator.