This is a practice understanding of piecewise functions from an analytic viewpoint.

1 : Determine if the following piecewise definition is a function or not.

Evaluate

2 : Determine if the following piecewise definition is a function or not.

Evaluate

3 : Determine if the following piecewise definition is a function or not.

Evaluate

4 : Determine if the following piecewise definition is a function or not.

Evaluate

5 : Determine if the following piecewise definition is a function or not.

Evaluate