# Interval Notation and Inequalities

Taught by YourMathGal
• Currently 4.0/5 Stars.
8550 views | 1 rating
Meets NCTM Standards:
Lesson Summary:

In this lesson, you will learn about interval notation, which is a different way of writing and graphing inequalities. By using brackets or parentheses, you can show the smallest number and largest number in an inequality. The use of notation helps to simplify writing solutions to inequalities, especially when dealing with large numbers. The lesson also covers how to graph the inequalities using both standard and interval notations.

Lesson Description:

Learn how to solve inequalities and write the solution in interval notation.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

• What is interval notation?
• How do you graph x >= 1?
• How do you write x >= 1 in interval notation?
• How do you graph and write x > -2 in interval notation?
• How do you know when to use parentheses and when to use brackets in interval notation?
• How do you graph and write x < 3 in interval notation?
• How do you graph and write -1 < x <= 3 in interval notation?
• How do you graph and write interval notation for x < a, x > a, x <=a, x >=a, a < x < b, a <= x <= b, a < x <= b, and a <= x < b?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson goes through the concept of interval notation, showing several examples including explanations of when to use parentheses, brackets, and infinity. This is a very important lesson for high school as well as college students who are learning interval notation.