Transcript Coordinate Plane

April 27, 2011
1) Write your homework in your agenda:
Homework and Practice 11-3
2) Open your agenda to your behavior card.
3) Turn in your FLATLAND project. Be sure
to include the rough draft, rubric,
checklist, and the final copy.
4) Take out some loose leaf paper. Set up
for Cornell Notes and vocabulary
acquisition.
Coordinate Plane
Ordered pairs are just PLANE
fun!!
What am I Learning Today?
Graphing on a Coordinate Plane
How will I show that I learned it?
Correctly identify the quadrants in which a
point lies
Locate and graph ordered pairs on the
coordinate plane
Vocabulary
• Coordinate plane: Formed by two number
lines in a plane that intersect at right angles.
• Axes: Two number lines in a coordinate
plane. X-axis is horizontal and y-axis is
vertical.
• Quadrants: The four sections created by the
intersection of the axes.
• Ordered pairs: Gives the location of a point
on a coordinate plane.
• Coordinate: The numbers in an ordered pair.
Questions
What does an
ordered pair
tell you?
What is the
ordered pair of
the origin?
Answers
The first number tells how far to move right
(positive) or left (negative) from the origin.
The second number tells how far to move up
(positive) or down (negative).
(0,0)
II
What are the
characteristics
of the
quadrants?
How are the
quadrants
labeled?
Quadrant
Quadrant
Quadrant
Quadrant
I: (+, +)
II: (-, +)
III: (-, -)
IV: (+, -)
-
+
I
+
X
III
- IV
Counterclockwise starting in the upper right
hand corner
A coordinate plane is formed by two
number lines in a plane that intersect at right
angles. The point of intersection is the zero
on each number line.
• The horizontal axis is
called the x-axis.
• The vertical axis is
called the y-axis.
• The point where the
axes intersect is
called the origin.
Identifying Quadrants
Name the quadrant where each point is located.
A. X
Quadrant IV
B. Y
Quadrant III
C. S
Quadrant II
Naming Points on a Coordinate Plane
Give the coordinates of each point.
X (4, –1)
From the origin, X is 4 units
right and 1 unit down.
Z (0, 4)
From the origin, Z is 0 units
right, and 4 units up.
Y (–2, –3)
From the origin, Y is 2 units
left, and 3 units down.
Graphing Points on a Coordinate
Plane
Graph each point on a coordinate plane.
Z (0, -4)
y
From the origin, move 4
units down.
T (1, –3)
From the origin, move 1
unit right, and 3 units
down.
4
2
x
–4
–2
0
2
–2
–4
T
Z
4
Now Try This
Name the quadrant where each ordered pair
is located.
1. (3, –5) IV
2. (–4, –2) III
3. (6, 2) I
4. (–7, 9)
II
Give the coordinates of each
point.
5. A (–2, 3)
6. B (1, 2)
7. C (0, –2)
8. D (–2, –3)
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