How to write the domain of a rational function

The video tutorial explains the concept of domain in functions, emphasizing that graphs extend indefinitely and any real number can be an input. It discusses how to determine the domain by identifying values that make a function undefined, particularly in rational functions where the denominator becomes zero. The tutorial also covers factoring to find solution sets and demonstrates how to write domain in interval notation, excluding specific values that make the function undefined.

What is the significance of the domain in a function?

Describe the domain of the function y = X^2.

What happens to the function when the denominator is set to zero?

Explain how to determine the domain of a rational function.

How do you express the domain in interval notation?