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Bar graphs

# Creating a bar graph

AP.STATS:
UNC‑1 (EU)
,
UNC‑1.C (LO)
,
UNC‑1.C.1 (EK)
,
UNC‑1.C.2 (EK)
CCSS.Math:
Sal creates a bar chart using data from a survey. Created by Sal Khan.

## Want to join the conversation?

• In a bar graph if you don't display all the data, is the problem still incorrect?
• From what I know, yes. The answer is incorrect if you don't have all the data on the graph
• can you do half numbers?
• Another reason to do halves is if there's a certain pattern. For example, if there's a bar chart that counts by even numbers 2-10 and the question tells you to plot 3 and 7, you can just put 3 between 2 and 4 and 7 between 6 and 8.
• what is quantative
• When something is quantitative it means that it can be represented as a quantity, which is to say a number. In the case of statistics a variable is quantitative when it deals with numbers.
For example, a teacher's favorite class is chemistry, their favorite class is a categorical variable. But if you say the number of teachers whose favorite class is chemistry is 3, that would be a quantitative variable, because it deals with numbers.
• which side is the x- axis and which is the y- axis?
• The x-axis is the horizontal (side-to-side) line that goes from left to right. In this bar graph, the x-axis is labeled with courses: physics, chemistry, geometry, history, and language.

The y-axis if the vertical (up-and-down) line that goes from bottom to top. The y-axis is labeled with numbers to show the number of teachers.

Hope this helps!
• what if the question said 10 teachers physics what would you do?
• If you want to make a bar graph to show 10 teachers. You could say 2 teacher. So, You could draw 5 because 2*5 = 10
• why do you need to make a bar graph for
• Because you can identify what you are graphing.
(1 vote)
• Can you use decimals in plot diagrams? Would the be wrong?
• Yes you can use decimals. On a plot diagram each line has a number. You would put 1 2 3 4. For decimals, on one line put 1, the 2nd line leave blank, the 3rd line would be 2. You would see 1 / 2 The / is the line with no number in-between 1 and 2 and that would be 1.5 Add more lines dependent on decimals.

So 2.3 would be 1 / / / / / / / / / 2 / / / / / / / / / / The 3rd / after 2 is 2.3 each / is .1

/ this is a line as the numbers, except you leave it blank. Even if it starts at 2.3 you do not put 2.3 under the line.