Stage 20 · Coordinates & First Functions

20.4.3 The Idea of a Function

20.4 Meeting Functions Through Change

Point 3 of 4

20.4.3 The Idea of a Function

Core idea

A machine that takes in one x and spits out exactly one y captures that unique matching, and we say y is a function of x.

Module goal. Introduce constants and variables, and distill the way one quantity depends on another into the central idea of a function
eastmath.com · 20.4 Meeting Functions Through Change · 20.4.3 The Idea of a Function