1. Cell phone use is prohibited.
Students:
Today is a red light day.
Cell phone use is prohibited.
This is your warning.

2. 1) Create a frequency table using the data below.
Hours Studying
{ 1 , 0 , 2 , 0 , 3 , 3 , 3 } x x x x x x x
Hours Studying
2) Find the Mean
= 1.7
3) Find the Median
= 2
4) Find the Mode
= 3

3. 12.05 Graphing Ordered Pairs

4. An ordered pair is a pair of numbers that represent the location of a point on a coordinate plane.
The notation for an ordered pair is:
P(x , y)
P is the name of the point.
x is called the x – coordinate.
y is called the y – coordinate.

5. A coordinate plane is formed by two intersecting number lines
A coordinate plane is formed by two intersecting number lines. Each number line is called an axis. x y
The horizontal axis is called the x – axis. II I
The vertical axis is called the y – axis.
Origin
The spot where the x axis and y axis cross is called the origin.
III IV
The coordinate plane is divided into 4 regions called quadrants.

6. To graph an ordered pair P(x , y)
Start at the origin, move x spaces left or right, move y spaces up or down, place a point at that spot.
Graph A(1 , 3) y
Move 1 space right and 3 spaces up.
A(1 , 3) x
Graph B(– 2 , – 1)
B(– 2 , – 1)
Move 2 spaces left and 1 space down.

7. Graph the following ordered pairs.x y
Graph C( – 3 , 1)
Graph D( 5 , 0)
C( – 3 , 1)
D( 5 , 0)
Graph E(– 1 , – 2)
E( – 1 , – 2)
Graph F( 1, – 4 )
F( 1 , – 4)

8. Find the coordinates of the following points.
J( – 3 , 0 )
K( 3 , – 3 ) J
L( 0 , – 2 ) L M
M( – 2 , – 4 ) K

9. Graph the following points.
Try This:
Graph the following points. x y
A( 2 , 1 ) F
B( – 5 , 0 )
C( 1 , – 3 ) A B
D( 0 , – 5 )
E( – 4 , – 1 ) E C
F( 5 , 4 ) D

10. Try This: Find the coordinates.x y
H( 3 , 2 )
J( – 2 , 0 ) L H
K( 2 , – 7 ) J
L( 0 , 5 )
M( – 4 , – 8 ) M K