https://www.khanacademy.org/math/precalculus-essentials/xb09485e87636188c:rational-functions 2026-06-30T17:30:43.834984468Z Rational functions Identify and analyze points of discontinuity in rational functions, including holes and asymptotes. Explore how to determine the end behavior of rational functions by examining the degrees of the numerator and denominator, and understand how these features influence the overall graph. unit