Answer Key • Lesson 3: Making Predictions from Best-Fit Lines
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1 TG • Grade 3 • Unit 12 • Lesson 3 • Answer Key Student Activity Book Treasure Map (SAB pp. 479–482) Questions 1–5 1. 2. Note: Coordinates can be listed in words or as an ordered pair. 3. A. See the map in Question 1. B. Yes. Possible explanation: The point for the chains falls close to the best-fit line because the chains are heavy and metal like the other objects along the line. The line shows how the objects sunk along the path of the sinking ship. 0 F R 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 0 10 20 30 40 50 60 70 80 90 100 Feet 0 10 20 30 40 50 Question 3A. Question 5A. Anchor Cannon Balls Cannon Chest of Coins Sword Treasure Chains Object Cannon Balls Sword Cannon Anchor Chest of Coins Chains (18, 35) (60, 145) 40 right, 85 front (0, 0) (50, 115) 75 right, 170 front Coordinates Answer Key • Lesson 3: Making Predictions from Best-Fit Lines Making Predictions from Best-Fit Lines SAB • Grade 3 • Unit 12 • Lesson 3 481 Name Date Copyright © Kendall Hunt Publishing Company You will need the treasure map, the map scale, and a ruler to solve these problems. 1. Draw a line on the treasure map from the anchor through the heavy objects. Use a ruler to draw a line as close to the points as possible. All of the points may not be on your line but they should be near the line you draw. 2. Complete the table with the coordinates for each of the objects on the treasure map. 3. A. When Grace and Nicholas were searching for the Ghost Galleon, they found some heavy chains. They found the chains 75 feet to the right and 170 feet to the front of the anchor. Mark a point on the map to show where they found the chains. Label the point on the map. B. Does this point fall close to your best-fit line? Explain your answer? Object Cannon Balls Sword Cannon Anchor Chest of Coins Chains (18, 35) 75 right, 170 front Coordinates Student Activity Book - Page 481 479 Name Date Treasure Map Grace and Nicholas made this map to show where the treasure was on the ocean floor. 0 F R 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 0 10 20 30 40 50 60 70 80 90 100 Feet 0 10 20 30 40 50 Anchor Cannon Balls Cannon Chest of Coins Sword Making Predictions from Best-Fit Lines SAB • Grade 3 • Unit 12 • Lesson 3 Copyright © Kendall Hunt Publishing Company Student Activity Book - Page 479 Copyright © Kendall Hunt Publishing Company
Transcript of Answer Key • Lesson 3: Making Predictions from Best-Fit Lines
1 TG • Grade 3 • Unit 12 • Lesson 3 • Answer Key
Student Activity Book
Treasure Map (SAB pp. 479–482)Questions 1–5
1.
2. Note: Coordinates can be listed in words or asan ordered pair.
3. A. See the map in Question 1.B. Yes. Possible explanation: The point for thechains falls close to the best-fit line becausethe chains are heavy and metal like theother objects along the line. The line showsh ow the objects sunk along the path of thesinking ship.
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Question 5A.
Anchor
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Answer Key • Lesson 3: Making Predictions from Best-Fit Lines
Making Predictions from Best-Fit Lines SAB • Grade 3 • Unit 12 • Lesson 3 481
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You will need the treasure map, the map scale, and a ruler to solve theseproblems.
1. Draw a line on the treasure map from the anchor through the heavyobjects. Use a ruler to draw a line as close to the points as possible.All of the points may not be on your line but they should be near theline you draw.
2. Complete the table with the coordinates for each of the objects on thetreasure map.
3. A. When Grace and Nicholas were searching for the Ghost Galleon,they found some heavy chains. They found the chains 75 feet tothe right and 170 feet to the front of the anchor. Mark a point onthe map to show where they found the chains. Label the point onthe map.
B. Does this point fall close to your best-fit line? Explain youranswer?
Object
Cannon Balls
Sword
Cannon
Anchor
Chest of Coins
Chains
(18, 35)
75 right, 170 front
Coordinates
Student Activity Book - Page 481
479
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Treasure MapGrace and Nicholasmade this map toshow where the treasure was on theocean floor.
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Making Predictions from Best-Fit Lines SAB • Grade 3 • Unit 12 • Lesson 3
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Student Activity Book - Page 479
Cop
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TG • Grade 3 • Unit 12 • Lesson 3 • Answer Key 2
Answer Key • Lesson 3: Making Predictions from Best-Fit Lines
4. A. 9 cm (to the nearest cm)B. 90 feet; Possible response: Since eachcentimeter is equal to 10 feet on the seafloor I multiplied 9 � 10 feet = 90 feet toget my answer.
5. A. See the map in Question 1B. 90 right, 200 front or (90, 200)
4. A. How far is it from the anchor to the cannon on the map?
B. How far is it from the anchor to the cannon on the sea floor? Show or tell how you found your answer.
5. A. Grace and Nicholas found the Ghost Galleon at the edge of thisgrid. Use your line to predict where they found the treasure. Markand label this point on the map.
B. What are the coordinates for the point you marked?
SAB • Grade 3 • Unit 12 • Lesson 3 Making Predictions from Best-Fit Lines482
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Student Activity Book - Page 482
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