https://es-cl.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions 2025-11-20T17:56:31.732617198Z Linear equations and functions When distances, prices, or any other quantity in our world changes at a constant rate, we can use linear functions to model them. Let's learn how different representations, including graphs and equations, of these useful functions reveal characteristics of the situation. unit