Line Plots — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A Grade 3 half-inch line plot of ribbons: 3, 3.5, 3.5, 4, 4, 4, 4.5, 5. What is the range?
A) 1.5
B) 2
C) 3
D) 5
5 minus 3 equals 2, so the range of the Grade 3 ribbon line plot is 2 inches.
2. A Grade 3 half-inch line plot of crayons shows 2 X above 3, 5 X above 3.5, 3 X above 4, 1 X above 4.5. Total measurements?
A) 9
B) 10
C) 11
D) 12
2 plus 5 plus 3 plus 1 equals 11 total crayons on the Grade 3 half-inch line plot.
3. On the Grade 3 crayon line plot, the tallest stack sits above 3.5 inches. What is the mode?
A) 3
B) 3.5
C) 4
D) 4.5
The tallest stack is above 3.5 inches, so 3.5 inches is the mode of the Grade 3 line plot.
4. A Grade 3 half-inch line plot has values from 4.5 to 6.5 inches. What is the range in inches?
A) 1
B) 1.5
C) 2
D) 2.5
6.5 minus 4.5 equals 2, so the range of the Grade 3 half-inch line plot is 2 inches.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A Grade 3 half-inch ribbon line plot has 5 X above 3.5 inches. The number of ribbons at 3.5 inches is 5.
5 X marks above 3.5 inches means 5 ribbons are 3.5 inches long on the Grade 3 line plot.
2. Grade 3 crayon line plot: 2 X above 3, 5 X above 3.5, 3 X above 4, 1 X above 4.5. The total crayons measured is 11.
2 + 5 + 3 + 1 equals 11 total crayons measured on the Grade 3 half-inch line plot.
3. A Grade 3 half-inch line plot has values from 4 to 5.5 inches. The range is 1.5 inches.
5.5 minus 4 equals 1.5, so the range of the Grade 3 half-inch line plot is 1.5 inches.
4. Grade 3 ribbon line plot: 1 X above 3, 4 X above 3.5, 2 X above 4. The mode is 3.5 inches.
The tallest stack of 4 X marks sits above 3.5, so 3.5 inches is the mode on the Grade 3 line plot.
5. Grade 3 line plot at 3.5 has 5 X marks and at 4 has 3 X marks. There are 2 more crayons at 3.5 than at 4.
5 minus 3 equals 2, so 2 more crayons are 3.5 inches than 4 inches on the Grade 3 line plot.