📊 Data & Graphs
What You'll Learn
- Read and interpret a bar graph
- Answer questions using data: most, fewest, difference, total
- Understand tally marks and how data is collected
What Is Data?
Data is information we collect and organize. We use graphs to make data easy to understand at a glance.
A bar graph uses bars of different heights to show amounts. The taller the bar, the bigger the number.
1. Which has the most? → tallest bar
2. Which has the fewest? → shortest bar
3. How many more/fewer? → subtract the two bars
4. Total? → add all the bars together
Tally Marks
Before making a graph, we collect data using tally marks:
- Each mark = 1 vote or item
- Every 5th mark crosses the others: ||||͡— = 5
- This makes counting fast: groups of 5!
Use the interactive bar graph below. Answer questions about the data, then try a new graph!
Course Complete!
You finished OKSTEM 3rd Grade Math! You mastered place value, all four operations, fractions, geometry, word problems, time, money, measurement, and data. Amazing work!
Take the Post-Assessment →Explore More Courses →
1. In a bar graph, the tallest bar represents which category?
2. A graph shows: Dogs=9, Cats=6. How many more dogs than cats?
3. What do tally marks help us do?