3. Formed by two real number lines that intersect at a right angle
y y-axis (vertical line)
8
6
4
2
x-axis
x
-10 -5 5 10 (horizontal
line)
-2
-4
-6
-8
The center is called the origin!
4. 4 Quadrants
Labeled Counterclockwise
y
8
6
II 4
I
2
-10 -5 5 10
x
-2
III -4 IV
-6
-8
5. Plotting an Ordered Pair
Plot the ordered pair (3,4) and label it.
y
8
1. Start at the
origin and 6
move 3 units
to the right 4 A Label
2
2. Move 4 units
up
-10 -5 5 10
x
3. Place your -2
point. Try these!
Click here!
-4
-6
-8
6. • An ordered pair is also know as coordinates. Written in the
form (x,y) The x units is the distance along the x-axis and y is
the distance along the y-axis.
7. Click to reveal Order Pair Practice
answers
1. What are the coordinates y
of Point B? 8
(-5, -4) 6
2. Plot the point C (-2, 0)
4
3. What are the coordinates 2
of Point D? C
(6, -2) -10 -5 5 10
x
-2
D
-4
B
-6
-8
8. Points are labeled using capital letters.
The x and y axis intersect at their zero
points.
Therefore the coordinates of the origin is
(0,0).
Points that are not in the quadrants we say
they lie on the x-axis or y-axis..
