MSM07G6_RESBK_Ch11_019-026.pe
2/10/06
11:14 AM
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Name
LESSON
Date
Class
Challenge
11-3 Plot and See
Graph each point below in the order given. Connect the points
as you graph them to see a creature that lives most of its life
50 feet below sea level, or 50 feet.
START: (0, 20), (1, 19), (3, 18), (5, 15), (6, 15), (6, 12), (10, 8),
(12, 8), (11, 6), (9, 6), (9, 7), (3, 11), (0, 11), (2, 12), (3, 4), (2, 1),
(3, 4), (1, 13), (0, 17), (4, 18), (7, 17), (7, 16), (5, 16),
(6, 14), (8, 15),(9, 18), (6, 20), (3, 20), (3, 18),
(4, 13), (2, 4), (3, 1), (4, 2), (6, 2), (5, 5),
(10, 12), (6, 18), (0, 20) STOP!
Check students’ graphs. The picture should be a seahorse.
y
20
2
0
16
1
6
8
4
x
1
16
6 1
12
2 8
8
O
4
4
4
8
12
1
2 1
16
6
8
8
1
12
2
1
16
6
2
20
0
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23
Holt Mathematics
MSM07G6_RESBK_Ch11_084-104.pe
2/10/06
11:43 AM
Page 89
Problem Solving
LESSON
11-3 The Coordinate Plane
Challenge
LESSON
11-3 Plot and See
Use the coordinate plane on the map of Texas below to answer
each question.
Graph each point below in the order given. Connect the points
as you graph them to see a creature that lives most of its life
50 feet below sea level, or 50 feet.
START: (0, 20), (1, 19), (3, 18), (5, 15), (6, 15), (6, 12), (10, 8),
(12, 8), (11, 6), (9, 6), (9, 7), (3, 11), (0, 11), (2, 12), (3, 4), (2, 1),
(3, 4), (1, 13), (0, 17), (4, 18), (7, 17), (7, 16), (5, 16),
(6, 14), (8, 15),(9, 18), (6, 20), (3, 20), (3, 18),
(4, 13), (2, 4), (3, 1), (4, 2), (6, 2), (5, 5),
(10, 12), (6, 18), (0, 20) STOP!
6
5
Amarillo
4
3
Lubbok
Check students’ graphs. The picture should be a seahorse.
Texarkana
Dallas
Fort
Worth
1
El Paso
0 1 2 3 4 5 6
Beaumont
–1 Austin
Houston
Galveston
San
–2
Antonio
–3
Corpus Christi
–4 Laredo
–6 –5 –4 –3 –2 –1
y
Big Bend National Park
20
Wichita Falls
2
Midland
16
–5
8
–6
4
x
O
4
16 12 8
4
8
12 16
1. Which location in Texas is closest to
the ordered pair (5, 2)?
8
2. What ordered pair best describes the
location of Dallas, Texas?
Galveston
12
(3, 2)
3. Which location in Texas is closest to
the ordered pair (6, 1)?
16
20
4. Which location in Texas is located in
Quadrant III of this coordinate plane?
El Paso
Big Bend National Park
5. Which three locations in Texas all
have positive y-coordinates and
nearly the same x-coordinate?
6. Which cities on this map of Texas
have locations with y-coordinates
less than 3?
Midland, Lubbock, and Amarillo
23
Copyright © by Holt, Rinehart and Winston.
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Holt Mathematics
Follow the directions below to create your own coordinate
drawing. Then decide if you have Happy Harry or Sad Selma!
y-axis
1. Plot the following points: (3, 3), (3, 5), (5, 3), (5, 5). Shade in
the square defined by those points. This square is in which
quadrant?
4
Quadrant II
Quadrant I
2
origin
Quadrant I
x-axis
O
2
2
Quadrant III
2. Plot these points: (3, 3), (3, 5), (5, 3), (5, 5). Shade in the
square. This square is in which quadrant?
4
Quadrant IV
Quadrant II
4
3. Plot these points: (2, 4), (2, 5), (2, 4), (2, 5).
This rectangle is in two quadrants; what are they?
Answer the following questions.
Quadrants III and IV
1. What is the horizontal number line of the coordinate plane
called?
4. Plot the following two sets of points and shade in the figures:
(2, 4), (3, 4), (2, 3), (3, 3)
(2, 4), (3, 4), (2, 3), (3, 3)
the x-axis
2. What is the vertical number line of the coordinate plane called?
5. Shade in a small area around the origin.
the y-axis
6. Do you have Happy Harry or Sad Selma?
3. Where do the number lines intersect?
Happy Harry
the origin, or point (0, 0)
y
Points are located on the coordinate plane with ordered pairs, such
as (3, 4). The numbers in an ordered pair are called coordinates.
Their order determines how to locate a point.
8
6
The first number in an ordered pair tells how far to move to the right
or left on the x-axis.
4
The second number in an ordered pair tells how far to move up or
down on the y-axis.
2
x
8 6 4 2 O
Answer the following questions.
2
4
6
8
2
4. What does an ordered pair tell you?
4
It tells the location of a point on the coordinate plane.
6
5. What are the two numbers in an ordered pair called?
8
coordinates
Copyright © by Holt, Rinehart and Winston.
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Holt Mathematics
Puzzles, Twisters & Teasers
LESSON
11-3 Face It!
A coordinate plane is formed when two number lines intersect at
right angles.
2
24
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Reading Strategies
LESSON
11-3 Focus on Vocabulary
4
Laredo and Corpus Christi
25
Copyright © by Holt, Rinehart and Winston.
Holt Mathematics
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
89
26
Holt Mathematics
Holt Mathematics