21.6 Piecewise Functions: A Different Rule for Each Stretch
Point 2 of 5
21.6.2 How to Write a Piecewise Function
Core idea
Use one big brace to line up "which formula goes with which stretch of x," noting the range each piece covers.
Module goal. Understand functions whose domain is split into blocks, with each block described by a different line, and learn to graph them and read values stretch by stretch.
eastmath.com · 21.6 Piecewise Functions: A Different Rule for Each Stretch · 21.6.2 How to Write a Piecewise Function