Grades Grade 3 Measurement & DataReading Data: Bar Graphs, Picture Graphs & Line Plots

Reading Data: Bar Graphs, Picture Graphs & Line Plots

📊 Measurement & Data

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Reading Data: Bar Graphs, Picture Graphs & Line Plots

Organized data in graphs and plots makes patterns easy to see and compare!

GRAPHS organize data visually. A PICTURE GRAPH uses symbols; a BAR GRAPH uses bars of different lengths; a LINE PLOT shows individual data points on a number line. Each type makes different patterns easy to spot and compare!

🖼️Picture graph — books read each day

Mon: 📚📚📚      (3 books)
Tue: 📚📚        (2 books)
Wed: 📚📚📚📚    (4 books)
Thu: 📚           (1 book)
Fri: 📚📚📚      (3 books)

Each 📚 = 1 book. Most read on Wednesday!

📊Bar graph — rainfall (cm) per month

Jan: ████████ 8 cm
Feb: █████    5 cm
Mar: ████████████ 12 cm
Apr: ██████████ 10 cm

March had the most rain!
Difference between March and February: 12 − 5 = 7 cm.

📏Line plot — lengths of pencils (in inches)

Each X represents one pencil:

  X   XX  X  XXX  X
|──|──|──|──|──|
4   5   6   7   8  (inches)

Most pencils are 7 inches long. The range is 8 − 4 = 4 inches.

Questions to ask when reading any graph:

1What is the title — what data is being shown?

2What do the labels mean on each axis or row?

3What is the scale — how much does each unit represent?

4Which category has the most? Which has the least?

5What is the difference (range) between the greatest and least values?

✏️ Try It!

A bar graph shows: Pizza=9, Tacos=6, Sushi=4. How many students were surveyed in total?

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Remember This!

The SCALE on a bar graph can be tricky! If each grid line = 2, a bar reaching the 4th line = 4 × 2 = 8, not 4. Always check what each unit represents.

Take Quiz 📝 — 26 Questions