Line Plots — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Data list for a Grade 3 line plot: 1, 2, 2, 3, 3, 3, 4. Above 3 there should be 3 X marks.
The number 3 appears three times in the data list, so 3 X marks go above 3.
2. Data list: 5, 6, 6, 6, 7, 7, 8. The Grade 3 line plot has 3 X marks above 6.
The value 6 appears three times in the Grade 3 data, so 3 X marks go above 6.
3. Data list: 2, 2, 4, 4, 4, 4, 5. The Grade 3 line plot has 4 X marks above 4.
The number 4 appears four times, so 4 X marks belong above 4 on the Grade 3 line plot.
4. Data list: 0, 1, 1, 2, 2, 2, 3. The total X marks on the Grade 3 line plot is 7.
There are 7 numbers in the list, so the Grade 3 line plot has 7 X marks total.
5. Data list: 10, 10, 11, 12, 12, 12, 13. The mode of the Grade 3 line plot is 12.
The value 12 appears three times, more than any other value, so 12 is the mode.
6. Data list: 3, 3, 3, 5, 5, 7. The Grade 3 line plot has 2 X marks above 5.
The number 5 appears twice in the Grade 3 data, so 2 X marks go above 5.
7. Data list: 1, 1, 1, 1, 2, 2, 3. The Grade 3 line plot has 4 X marks above 1.
The value 1 appears four times in the data, so 4 X marks belong above 1 on the Grade 3 line plot.
8. Data list: 6, 7, 7, 8, 8, 8, 9, 9. The total X marks on the Grade 3 line plot is 8.
There are 8 values in the list, so 8 X marks appear on the Grade 3 line plot.
9. Data list: 2, 4, 4, 4, 6, 6, 8. The mode of the Grade 3 line plot is 4.
The value 4 appears three times, more than any other value, so 4 is the mode of this Grade 3 plot.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Data list 1, 2, 2, 3, 3, 3 — X marks above 3
→ 3
3
Data list 5, 5, 6, 6, 6, 6 — X marks above 6
→ 4
4
Data list 0, 0, 1, 2, 2 — total X marks
→ 5
5
Data list 4, 4, 4, 4, 4, 7, 7 — mode value
→ Mode is 4
Mode is 4
Each Grade 3 data list matches a count or mode based on how often each value appears.