Grade 3 Data & Graphs: Line Plots
Read line plots of measurements in halves and fourths
What You'll Learn
- Read measurements in halves and fourths on a number line
- Count the X’s above a measurement
- Find the most common measurement, totals and how many are greater
📖Line Plots
Each X represents one data point above the number line! The marks between whole numbers show halves and fourths.
Worked examples
Real problems from the practice worksheets, solved one step at a time.
Example 1
Bead Bags Each X is one bag of beads.
How many bags of beads weigh 3 1/4 pounds?
- Find 3 1/4 on the number line.
- Count the X’s above it: 2. Each X is one bag of beads.
- So 2 bags of beads measure 3 1/4 pounds.
Answer: 2
Example 2
Worm Lengths Each X is one worm.
How many worms are longer than 4 inches?
- Greater amounts are to the right of 4 on the number line (do not count the X’s at 4 itself).
- X’s to the right: 4 1/2 → 3.
- That is 3, so the answer is 3.
Answer: 3
Example 3
Ribbon Lengths Each X is one ribbon.
How many ribbons are on the line plot in all?
- Each X is one ribbon. Count the X’s above each number: 2 → 4, 2 1/2 → 1, 3 → 3, 3 1/2 → 2, 4 → 2, 4 1/2 → 4, 5 → 4.
- Add them all: 4 + 1 + 3 + 2 + 2 + 4 + 4 = 20. So there are 20 ribbons in all.
Answer: 20