23.1 From Functions to Quadratics: Getting Started
Point 1 of 5
23.1.1 Revisiting the Function Family
Core idea
You've already walked three roads — direct-proportion, linear, inverse-proportion — each turning inputs into outputs by a different rule; now meet a new rule, y=f(x).
Module goal. Pick up the family of functions you've already met, get to know quadratics as a new member, and build their algebraic definition.
eastmath.com · 23.1 From Functions to Quadratics: Getting Started · 23.1.1 Revisiting the Function Family