This document defines and provides examples of linear functions. It begins by stating the objective is to define and describe linear functions using points and equations. It then defines that a linear function is of the form f(x)=mx+b, where m is the slope and b is the y-intercept. Several examples are provided to illustrate identifying if a function is linear and calculating its slope and y-intercept. The document also discusses rewriting linear equations between the standard and slope-intercept forms.