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### Course: Class 9 (Old)>Unit 10

Lesson 1: Bar graphs

# Reading bar charts: comparing two sets of data

A bar chart is especially useful with comparing two sets of data. The difference in the bars give us a quick snapshot that allows us to draw some conclusions. Created by Sal Khan.

## Want to join the conversation?

• At Sal said 80 and 85. what is the answer?
• 85. He's not really saying 80, he's just hesitating a bit the first time and starts over saying 85. Looks like 80... like 85.
• when ever the blue line is not all the way on a number will it allways be 5?
• On the Khan Academy practice shown, yes, because they're counting by tens on the y-axis scale and the bars in between are always exactly half way in between.

In other situations, though, not always. You have to look carefully at the bar and the y-axis scale to see where the bar is and what they're counting by.
• What is the difference between "bar chart" and "bar graph"?
• they're the same thing, just different names :)
• Why do I get more energy points from watching a video than from answering 7 questions right?
• which website are u using for bar-chart in this video?
• I'm pretty sure that is Khan Academy, but this is a relatively old video, which is why it looks different.
(1 vote)
• I think you cut the numbers in hkf
• what if the bar is in between the line