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Name
LESSON
Here
Date
Class
Practice A
9-3 The Coordinate Plane
Use the coordinate plane to answer questions 1 and 2.
Circle the letter of the correct answer.
1. Which point is located in Quadrant I?
A point Q
B point P
C point X
Y (!2, 1)
D point Y
2. Which point is located in Quadrant IV?
F point X
G point Y
H point Q
J point P
!4
Q (!3, !2)
4
X (2, 3)
2
x
O
2
!2
4
P (1, !2)
!4
Use the coordinate plane to answer questions 3 and 4.
Circle the letter of the correct answer.
3. What are the coordinates of point A?
A (1, 3)
B (3, 1)
C (3, !1)
D (!1, 3)
4. What are the coordinates of point D?
F (1, !1)
G (1, 1)
H (!1, 1)
J (!1, !1)
!4
y
B
4
2
x
C
!2
O
!2
2
D
A
4
!4
5. If a point is located at the origin, what
are that point’s coordinates?
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
!2
y
6. What is the difference between the
x-axis and the y-axis?
27
Holt Middle School Math Course 1
Puzzles, Twisters & Teasers
9-2 To Tell the Truth
Problem Solving
9-2 Comparing and Ordering Integers
LESSON
LESSON
For each box, decide whether the statement is true or false.
Use the table below to answer each question.
If it is false, black out the box.
Continental Elevation Facts
Continent
Highest
Point
Elevation (ft)
above sea level
Lowest
Point
Elevation (ft)
below sea level
Africa
Mount Kilimanjaro
19,340
Lake Assal
!512
Antarctica
Vinson Massif
16,066
Bentley Subglacial
Trench
!8,327
Asia
Mount Everest
29,035
Dead Sea
!1,349
Australia
Mount Kosciusko
7,310
Lake Eyre
!52
Europe
Mount Elbrus
18,510
Caspian Sea
!92
North America
Mount McKinley
20,320
Death Valley
!282
South America
Mount Aconcagua
22,834
Valdes Peninsula
!131
1. What is the highest point on Earth?
What is its elevation?
The remaining boxes will give you the visual effect of a number.
What is the number?
2 ! !7
Bentley Subglacial Trench;
above sea level
W
J
M
0 ! !1.5
U
Least to greatest
!4, 8, !27
R
!2! " !!3!
4 " !!4!
4. Which point on Earth is lower, the
Caspian Sea or Lake Eyre?
Mount Kilimanjaro
T
A
!!3! " !2!
0 " !1.5
!!4! ! !!3!
E
K
I
Now see if you can answer the following riddle. To do so, take
the letters from the boxes that you did not cross out and
rearrange them.
Caspian Sea
The remaining letters are
Circle the letter of the correct answer.
W
U
T
A
S
L
I
What kind of suit do lawyers wear?
6. Which continent has a lower
elevation than Africa?
F Australia
G Europe
H Asia
!
J South America
5. Which continent has a higher
elevation than North America?
A Antarctica
B South America
!
C Europe
D Australia
S
Least to greatest
!27, !4, 8
L
8,327 feet below sea level
3. Which point on Earth is higher,
Mount Elbrus or Mount Kilimanjaro?
!7 ! 2
!1 " !6
!6 " !1
2. What is the lowest point on Earth?
What is its elevation?
Mount Everest; 29,035 feet
4
(Clue: The name of the number has the same number of letters as its value.)
L
A
W
S
U
I
T
7. Write the continents in order by their highest points, from highest
elevation to lowest elevation.
Asia, South America, North America, Africa, Europe, Antarctica,
Australia
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All rights reserved.
23
Holt Middle School Math Course 1
Exploration Recording Sheet
9-3 The Coordinate Plane
LESSON
Use the coordinate plane to answer questions 1 and 2.
Circle the letter of the correct answer.
1. Which point is located in Quadrant I?
A point Q
B point P
C point X
!
Y (!2, 1)
D point Y
y -axis
II (!3, 4)
(!2, 3)
(3, 4)
3
I
(2, 3)
x -axis
2
!2
(!2, !3)
2. Which point is located in Quadrant IV?
F point X
G point Y
H point Q
J point P
!
(2, !3)
!3
III (!3, !4)
Holt Middle School Math Course 1
Practice A
9-3 The Coordinate Plane
LESSON
On the coordinate plane shown, the
color of the first number in each
ordered pair matches the color of
the x-axis, and the color of the
second number in each ordered
pair matches the color of the
y-axis.
24
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All rights reserved.
(3, !4) IV
1. The four points graphed are labeled with their ordered pairs.
How are these four ordered pairs alike? How are they different?
Possible answer: The first numbers in each pair have the same absolute
values. Points on the right of the y-axis have a positive x-coordinate;
points on the left of the y-axis have a negative x-coordinate; points above
the x-axis have a positive y-coordinate; points below the x-axis have a
!4
Q (!3, !2)
4. What are the coordinates of point D?
F (1, !1)
!
G (1, 1)
H (!1, 1)
J (!1, !1)
negative y-coordinate.
Think and Discuss
3. Describe what each number in an ordered pair tells you.
!4
2
!2
4
P (1, !2)
y
B
4
2
x
C
!2
O
2
D
A
4
!4
6. What is the difference between the
x-axis and the y-axis?
(0, 0)
second tells how many units to move up or down.
x
O
!2
5. If a point is located at the origin, what
are that point’s coordinates?
Possible answer: The first tells how many units to move left or right, the
X (2, 3)
2
!4
Use the coordinate plane to answer questions 3 and 4.
Circle the letter of the correct answer.
3. What are the coordinates of point A?
A (1, 3)
B (3, 1)
C (3, !1)
!
D (!1, 3)
2. Plot the points (3, 4), (!3, 4), (!3, !4), and (3, !4) on the
same coordinate plane. See above.
!2
y
4
The x-axis runs horizontally;
the y-axis runs vertically.
4. Explain how a negative sign indicates which direction to move
when plotting points on a coordinate plane.
Possible answer: A negative x-coordinate puts the point left of the y-axis;
a negative y-coordinate puts the point below the x-axis.
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
26
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
Holt Middle School Math Course 1
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
95
27
Holt Middle School Math Course 1
Holt Middle School Math Course 1