### R.2 The Number Line

1: Introduction to the Number Line

This video covers:

*Introduction to the number line and inequality symbols.

*Showing what the number line looks like.

*Identifying all four of the inequality symbols and examples of each.

Vocabulary words: Tick Marks

Examples:

2: Operations over Positive and Negative Numbers

This video covers:

*How to add, subtract, multiply and divide with both positive and negative numbers.

Examples:

3: Notating a Set of Numbers - Part 1: Definitions and Graphing on a Number Line

This video covers:

*Notating a set of numbers by graphing them on the number line.

*How the words "including" alter the graphing solution.

*When to use brackets and/or parenthesis on the endpoints.

Vocabulary Words: Notation, Set of Numbers

Examples:

4: Notating a Set of Numbers - Part 2: Interval and Set-Builder Notation

This video covers:

*What Interval Notation is and how to put a set of numbers in Interval Notation.

*What Set-Builder Notation looks like is and how to write a set of numbers in Set-Builder Notation using inequality symbols.

*How 'Bob-the-Builder' helps us remember what Set-Builder Notation is.

*How to draw braces and what they mean.

Vocabulary Words: Braces

Examples:

5: Notating a Set of Numbers - Part 3: Examples

This video covers:

*Examples of putting expressions in all three set notations: Graphing on a number line, interval notation, set-builder notation.

*How to represent the end of the number line in interval notation.

*Where the variable should go in set-builder notation.

*The different format that the examples can come in.

Examples:

6: Absolute Value - Part 1: Introduction and Simple Examples

This video covers:

*The formal definition and notation of absolute value, and how it relates to the number line.

*Finding the distance between two numbers on on the number line.

Examples:

7: Absolute Value - Part 2: Rules of Order

This video covers:

*Review of PEMDAS

Examples:

Coming soon:

(1) Difference between subtraction and negative symbol on graphing calculator

(2) Absolute Value on graphing calculator

(3) Absolute Value and Rules of order on graphing calculator