Understanding Functions and Interval Notation

The video tutorial explains how to use interval notation to represent the domain and range of functions. It covers the concept of domain, including how to identify it on a graph and the significance of arrows indicating infinity. The tutorial also discusses the range, emphasizing the importance of understanding the graph's direction. Finally, it addresses how to determine if a graph represents a function, introducing the vertical line test as a method for verification.

What is interval notation primarily used for?

• To find the slope of a line

• To solve equations

• To represent domain and range

• To calculate derivatives

Which axis is used to determine the domain of a function?

• W-axis

• X-axis

• Z-axis

• Y-axis

What does an arrow pointing to the right on a graph indicate about the domain?

• The domain is positive

• The domain is negative

• The domain includes all real numbers

• The domain is limited

In interval notation, what does a parenthesis around a number signify?

• The number is excluded

• The number is included

• The number is a minimum

• The number is a maximum

What is the vertical line test used for?

• To solve quadratic equations

• To determine if a graph is a function

• To find the slope of a line

• To calculate the range