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Math Grade 2-3 Answer Key

Math: Line Plots and Dot Plots

Organizing and reading data with Xs and dots

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Math: Line Plots and Dot Plots

Organizing and reading data with Xs and dots

Math - Grade 2-3

Instructions: Read each problem carefully. Use the data or plot to answer the question. Show your work in the space provided.
  1. 1

    The numbers of apples in 8 lunch boxes are 2, 3, 2, 4, 1, 2, 3, and 4. Make a dot plot for the data.

    Count how many times each number appears before drawing the dots.

    The dot plot should show 1 dot above 1, 3 dots above 2, 2 dots above 3, and 2 dots above 4.
  2. 2

    A dot plot shows favorite playground games. Tag has 5 dots, swings has 3 dots, and slide has 4 dots. Which game was chosen by the most students?

    Tag was chosen by the most students because it has 5 dots, which is more than 3 or 4 dots.
  3. 3

    A line plot shows the number of stickers students have. There are 2 Xs above 4, 4 Xs above 5, and 1 X above 6. How many students are shown in all?

    Each X stands for one student.

    There are 7 students shown in all because 2 + 4 + 1 = 7.
  4. 4

    The heights of 9 plants in inches are 5, 6, 5, 7, 6, 6, 8, 5, and 7. How many plants are 6 inches tall?

    There are 3 plants that are 6 inches tall.
  5. 5

    Use this dot plot data: 0 pets has 2 dots, 1 pet has 4 dots, 2 pets has 3 dots, and 3 pets has 1 dot. How many students have at least 2 pets?

    At least 2 means 2 or more.

    There are 4 students who have at least 2 pets because 3 students have 2 pets and 1 student has 3 pets.
  6. 6

    The number of books read by students are 1, 2, 2, 3, 3, 3, 4, and 4. Which number should have the most dots on a dot plot?

    The number 3 should have the most dots because it appears 3 times in the data set.
  7. 7

    A line plot shows pencil lengths in inches. There is 1 X above 5, 3 Xs above 6, 2 Xs above 7, and 1 X above 8. How many more pencils are 6 inches long than 8 inches long?

    Compare the number of Xs above 6 and above 8.

    There are 2 more pencils that are 6 inches long than 8 inches long because 3 - 1 = 2.
  8. 8

    The numbers of goals scored in soccer games are 2, 1, 3, 2, 0, 2, 1, and 4. Make a line plot for the data.

    The line plot should show 1 X above 0, 2 Xs above 1, 3 Xs above 2, 1 X above 3, and 1 X above 4.
  9. 9

    A dot plot shows how many crayons are in pencil boxes. 6 crayons has 2 dots, 7 crayons has 5 dots, and 8 crayons has 3 dots. How many pencil boxes have 7 crayons?

    There are 5 pencil boxes that have 7 crayons.
  10. 10

    The data are 10, 12, 11, 10, 13, 12, 10, and 11. What numbers should be labeled on the number line for a line plot?

    List the smallest value through the largest value.

    The number line should be labeled 10, 11, 12, and 13 because those are the values in the data.
  11. 11

    A line plot shows jump rope counts. 20 has 3 Xs, 21 has 1 X, 22 has 4 Xs, and 23 has 2 Xs. Which count happened exactly 2 times?

    The count 23 happened exactly 2 times because there are 2 Xs above 23.
  12. 12

    Mia made a dot plot for this data: 1, 1, 2, 2, 2, 3, and 4. She put 2 dots above 1, 2 dots above 2, 1 dot above 3, and 1 dot above 4. What mistake did Mia make?

    Count the 2s in the data set.

    Mia made a mistake above 2. She should have put 3 dots above 2 because the number 2 appears 3 times.
  13. 13

    A dot plot shows the number of sunny days each week. 4 days has 1 dot, 5 days has 3 dots, 6 days has 2 dots, and 7 days has 4 dots. How many weeks are shown?

    There are 10 weeks shown because 1 + 3 + 2 + 4 = 10.
  14. 14

    The numbers of shells collected by 10 students are 5, 6, 5, 8, 7, 6, 5, 8, 6, and 7. Which two numbers have the same number of dots on a dot plot?

    Make a tally for 5, 6, 7, and 8.

    The numbers 7 and 8 have the same number of dots because each number appears 2 times.
  15. 15

    A line plot shows points scored in a game. 2 points has 2 Xs, 3 points has 3 Xs, 4 points has 2 Xs, and 5 points has 1 X. What is the difference between the greatest number of points and the least number of points shown?

    Find the largest label and the smallest label that have Xs.

    The difference is 3 points because the greatest number shown is 5 and the least number shown is 2, and 5 - 2 = 3.
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