1. The horizontal number line is called the ______. x-axis
The Coordinate Plane
The horizontal number line is called the ______. y x 5 -4 -2 1 3 -5 -1 4 -3 2
x-axis
Quadrant II
(–, +)
Quadrant I
(+, +)
The vertical number line is called the ______.
y-axis
The point of intersection of the two axes is called the _____.
Quadrant III
(–, –)
Quadrant IV
(+, –)
origin
The two axes separate the plane into four regions called _________.
quadrants

2. Completeness Property for Points in the Plane
The Coordinate Plane
An ordered pair of real numbers, called coordinates of a point, locates a point in the coordinate plane.
Each ordered pair corresponds to EXACTLY ________ in the coordinate plane.
one point
The point in the coordinate plane is called the graph of the ordered pair.
Locating a point on the coordinate plane is called _______ the ordered pair.
graphing
Postulate 2 – 4
Completeness Property for Points in the Plane
Each point in a coordinate plane corresponds to exactly one __________________________.
Each ordered pair of real numbers corresponds to exactly one __________________________.
ordered pair of real numbers
point in the coordinate plane

3. Graphing an ordered pair, (point): (x, y)
The Coordinate Plane
Graphing an ordered pair, (point): (x, y)
Graph point A at (4, 3)
The first number, 4, is called the
___________. y x 5 -4 -2 1 3 -5 -1 4 -3 2
x-coordinate
(4, 3)
It tells the number of units the point lies to the __________ of the origin.
left or right
(0, 0)
The second number, 3, is called the
___________.
y-coordinate
It tells the number of units the point lies _____________ the origin.
above or below
What is the coordinate of the origin?

4. Graphing an ordered pair, (point): (x, y)
The Coordinate Plane
Graphing an ordered pair, (point): (x, y)
Graph point B at (2, –3)
The first number, 2, is called the
___________. y x 5 -4 -2 1 3 -5 -1 4 -3 2
x-coordinate
It tells the number of units the point lies to the __________ of the origin.
left or right
The second number, –3, is called the
___________.
y-coordinate
(2, –3)
It tells the number of units the point lies _____________ the origin.
above or below

5. Name the points A, B, C, & D Point A(x, y) = (3, 2) B B A A
The Coordinate Plane
Name the points A, B, C, & D y x 5 -4 -2 1 3 -5 -1 4 -3 2
Point A(x, y) =
(3, 2)
(–3, 2) B B
(3, 2) A A
Point B(x, y) =
(–3, 2)
Point C(x, y) =
(–3, –2)
Point D(x, y) =
(3, –2)
(–3, –2) C C D
(3, –2) D