1. Unit 2 Day 1 The Coordinate Plane
Essential Questions: What are the different pieces of a coordinate plane? How do you plot points on a coordinate plane?

2. Vocabulary
Coordinate Plane: is formed by two lines that intersect at a right angle:
x-axis: the horizontal axis on a coordinate plane
y-axis: the vertical axis on a coordinate plane
Origin: where the x-axis and y-axis intersect at (0 , 0)
Ordered Pair: a point you plot on a coordinate plane in the form (x , y)
Scatter Plot: a type of graph that is used to see trends in data and to make predictions by plotting points but not connecting them with a line

3. Scatterplots
We could display the cost of flights between two cities for a week to see when fares tend to be the lowest.
S M T W T F S

4. Weight Height 64 66 68 70 72 74 76 Height (inches) 72 70 71 69 73 66
Weight (pounds)
190
170
180
175
160
150
200
Height
Weight
160
150
170
180
190
200 64 66 68 70 72 74 76
140

5. The Coordinate Plane y-axis origin x-axis Quadrant I (+ , +) 3 2 1 -1 -2 -3
y-axis
origin
x-axis
Quadrant I
(+ , +)
Quadrant II
(- , +)
Quadrant III
(- , -)
Quadrant IV
(+ , -)

6. Example 1: Give the ordered pair for the following points.
Point A
Point B
Point C
Point D
Point E A E D B C
Example 1: Give the ordered pair for
the following points.
(-3 , 2)
(0 , 3)
(5 , 5)
(3 , 0)
(-1 , -4)

7. Example 2: Without graphing, name the quadrant
or axis location of each point.
(2 , 1)
(-3 , 0)
(5 , -3)
(-2 , -2)
(0 , 4)
(-2 , 3) 3 2 1 -1 -2 -3
Quadrant I
(+ , +)
Quadrant II
(- , +)
Quadrant III
(- , -)
Quadrant IV
(+ , -)
Quadrant I
x-axis
Quadrant IV
Quadrant III
y-axis
Quadrant II

8. Example 3: Plot and label the points from example 2.
C (5 , -3)
D (-2 , -2)
E (0 , 4)
F (-2 , 3) F E A B D C

9. Summary
Essential Questions: What are the different pieces of a coordinate plane? How do you plot points on a coordinate plane?
Take 1 minute to write 2 sentences answering the essential questions.