Domain and Range

The video tutorial introduces functions as a special type of relation where each input has a unique output, using real-world examples like vending machines and texting. It explains the concepts of domain and range, including how they can be represented with notation. The tutorial covers linear functions, highlighting that their domain and range are all real numbers. It also discusses quadratic functions, showing how their graphs form parabolas with specific ranges. Finally, the video demonstrates how graphs can be used to visualize the domain and range of functions.

Describe the characteristics of a linear function in terms of its domain and range.

What is a parabola and how does it relate to the graph of a quadratic function?