Warm-up
August 28 Thursday
Copy the question, draw the diagram and show your work in the box on
your warm-up page.
What is the perimeter of the rectangle?
What is the area of the rectangle?
5x - 4
3x - 2
3x - 2
5x - 4
Note #3 Number Classification and Interval
Notation
• We will discuss number classification and how to use interval
notations.
• I will write interval notations by looking at number lines.
Real Number System
Inequality Signs
<
>
>
<
≠
less than
greater than
greater than or equal to
less than or equal to
not equal to
#2 Interval Notation – Using ( ) and [ ]
[
]=
(
)=
+∞
-∞
U = Union
#
1
2
3
4
Algebraic
Notation
Number Line
Interval Notation
#
5
6
7
8
Algebraic
Notation
Number Line
Interval Notation
Exit ticket – Draw a number line and write the
variable using the interval notation.
1)-3 ≤ x < 5
2)x < -2 OR x ≥ 3