1. Section 1.1 and 1.4

2. rational numbers
integers
0.5 -5 -2
whole numbers
counting/natural #s

3. The rational numbers combined with the irrational numbers make up the set of Real Numbers.
integers
irrational
numbers
whole numbers
Counting/natural numbers
REAL NUMBERS
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1-1: Sets of Numbers 3 3

4. Intervals (3, 5) 3 < x < 5
An interval is a set of all numbers between two endpoints, such as 3 and 5.
The following symbols are used in interval notation.
Brackets [ ] : DO include endpoints INCLUSIVE
Parentheses ( ) : used to exclude endpoints
The set of real numbers between but not including 3 and 5.
(3, 5)
3 < x < 5
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1-1: Sets of Numbers 4 4

5. Writing in Interval Notation
Numbers less than 3
Inequality
Graph
Interval notation

6. Writing in Interval Notation
Numbers greater than or equal to -2
Inequality
Graph
Interval notation