seegongsik
Grade 2 (age 7-8)

grade 2 Tables & Graphs

A survey gives us lots of data, and tables and graphs are the tidy way to organize it. Write down how many classmates like each fruit and you get a table; turn those counts into bars and you get a graph. A graph shows which one has the most and least at a glance. Change the number of students for each fruit and watch the table and bar graph update.

Collecting data

📋 A class survey on favorite fruit
①The class raised hands to show which fruit they like best
②Writing the count for each fruit gives you a table
③Drawing a bar as tall as each count gives you a graph

Organizing data in a table

8
5
10
7
💡 Why tables help
①Each fruit has its own column with the number of students
②You can read the exact number in each box right away
③The total of all the students is written under the table
④When you need exact numbers and a total, a table is handy

Drawing a graph

📊 Graphs make it even easier
①The numbers you set with the sliders above show up as bar heights too
②The taller the bar, the more students like that fruit
③The number above each bar is the count
④A graph shows the most and least popular fruit at a glance

Wrap-up

Steps for organizing data
collect data → make a table → draw a graph
Organize what you found out, step by step
Reading a table
find the most, the least, and the difference
Compare the numbers in the table and find differences
Reading a graph
bar height = amount, taller bar = more
Compare sizes by the heights of the bars
🎯 Remember
①Sorting survey data by category gives a table
②Showing a table's numbers as bars gives a graph
③A graph is best for comparing at a glance
④Always label the categories and the amounts
⑤You can find the most, the least, and the difference between them

Examples and unit check

Example 1
In a favorite fruit survey, 8 students chose strawberry, 5 grape, 10 apple, and 7 banana. How many students took part in all?
1
Add up the number of students for every fruit.
2
8 + 5 + 10 + 7 = 30 students.
▸ 30 students
The total of a table is the sum of all the categories.
Example 2
In the survey above, what is the difference between the most and least popular fruit?
1
The most popular is apple with 10 students, and the least is grape with 5.
2
The difference is 10 − 5 = 5 students.
▸ 5 students
Compare the tallest bar with the shortest bar to find the difference.
Unit check
In a bar graph, what does the tallest bar stand for?
①The category with the fewest
②The category with the most
③The total
④The average
▸ ② The category with the most
1
In a bar graph, a taller bar means a larger amount.
2
So the tallest bar stands for the category with the most.
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Pattern Finding

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