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Unit 1b
Terminology of
Cartesian Plane
Quality Core
D.2.f
Vocabulary
Coordinate
Plane
Horizontal number line and a vertical
number line intersecting at a point
X-axis
The horizontal axis in a coordinate
system
Y-axis
The vertical axis in a coordinate system
Vocabulary
Quadrant
Coordinates
Origin
Each of four parts in a plane
An ordered pair of numbers that
locates a point in the coordinate
plane with references to the x- and yaxes.
The point where the x- and y-axes
intersect in a coordinate system.
Vocabulary
X-coordinate
The first number of an ordered pair
of numbers that corresponds to a
point in a coordinate system.
Y-coordinate
The second number of an ordered
pair of numbers that corresponds
to a point in a coordinate system.
Ordered Pairs
A pair in which one member is
designated as the first and the
other member as the second.
Review Quadrants
Cartesian Plane City
 Use the checklist to complete the
activity.
 Changes to checklist:
Multiply each area by 5.
Increase the road system to 2 units.
On a separate piece of paper or on
the back of the page, name the point
of each tree you plot. (You must have
20 trees.)
Locating Points
 Which
two points
have the same
x-coordinate?
Point C and Point F
Point A and Point G
Point B and Point H
Absolute Value of
Coordinates

Name a point in
Quadrant I that has
an x-coordinate
with the same
absolute value as
the x-coordinate of
point F.
Which Quadrants?
 Which two quadrants in
the Cartesian coordinate
plane contain the line
below?
x +5=0
x = -5
II
III
Which Quadrants?
 Which two quadrants in
the Cartesian coordinate
plane contain the line
below?
y–2=2
y=2+2
y=4
II
I