Determining when a function is increasing decreasing or constant

The video tutorial explains piecewise functions, which are combinations of multiple functions defined by specific constraints. It covers how to identify intervals where the graph is increasing, constant, or decreasing. The tutorial highlights that the graph is increasing from negative infinity to zero and from two to infinity, with no decreasing intervals. It also explains constant intervals between zero and two. The instructor uses a car speed analogy to clarify these concepts.

Describe the conditions under which a graph is considered decreasing.

How can you relate the behavior of a piecewise function to real-life scenarios, such as the speed of a car?