Is the graph even or odd?

The video tutorial explains the concepts of even and odd functions based on symmetry. It describes how a function is even if it is symmetrical about the Y axis and odd if symmetrical about the origin. The instructor provides examples to illustrate these concepts and discusses how to identify symmetry in graphs. The importance of these concepts is hinted at for future lessons.

Explain the conditions under which a function can be considered even.

Why is understanding symmetry important in the study of functions?