Graph piecewise functions three equations

The video tutorial covers graphing three different equations: a cubic function, a horizontal line, and a linear function. Each function is graphed with specific domain restrictions. The tutorial explains how to apply these restrictions and visualize the piecewise function that results from combining these graphs.

Describe the linear function y = X - 1 and its domain restrictions.

What does the term 'piecewise function' refer to in the context of this lesson?