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BAR GRAPH’S

BAR GRAPH’S. Brixon Wuellner 12/30/13 A-1. Who Invented Them???. William Playfair, a Scottish engineer is best known for the invention of the bar graphs. However, Nicole Oresme - a Frenchman - is said to have used a bar chart back in the 14th century. William Playfair.

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BAR GRAPH’S

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  1. BAR GRAPH’S Brixon Wuellner 12/30/13 A-1

  2. Who Invented Them??? William Playfair, a Scottish engineer is best known for the invention of the bar graphs. However, Nicole Oresme - a Frenchman - is said to have used a bar chart back in the 14th century. William Playfair

  3. What Do They Explain??? Bar graphs have a vertical ‘Y’ axis and a horizontal ‘X’ axis. Like this: They represent the relationship between 2 different sets of data.

  4. What Are They For??? Bar graphs are used for surveys like this: example below. A bar graph gives you a picture of the data that you have collected. In this example you can see that the highest temperature charted, occurred in August and was 35 C.

  5. What Are They For Continued Bar graphs can be used to portray information collected from survey questions such as, “How many kids have pets?” Since there is usually a variety in pets there would be a bar for each pet. To read the chart you would have to see where the bar stops and read the number that is on the ‘Y’ axis.

  6. How Does This Relate To Math??? You can add each set of data to get a total number of whatever. You can find which set of data had the least frequency by looking at the lowest bar and reading the number. To find the difference between two sets of data on the graph you just subtract the two numbers to get the difference.You can also find the mean, median,mode and range of the bar graph data.

  7. Problem #1 Who ate the most waffles? To get this problem correct you look at the tallest bar and look on the ‘Y’ axis to see which one’s the highest and it would be Jeffry.

  8. Problem #2 What is the median of the data on this Graph? To get the median you list all the numbers in order from least to greatest and find the middle number which would be 6. 2, 5, (6,) 7, 12

  9. Problem #3 What is the mean of the data on this bar graph? To get the mean you need to add up the data. After you get the sum which would be 32 you would then divide that by 5 because you added 5 numbers and then you get the mean which would be 6.4.

  10. Problem #4 What is the difference of waffles eaten between Dad and Jaxon? To get the difference you subtract Dads number (7) by Jaxon’s number (6) the answer is 1.

  11. Problem #5 Find out the range of the data? To get the range you need to get the number of the highest and lowest data then subtract them and the answer is 10.

  12. Bar Graph Lesson (Video) Double Click on image above to play video.

  13. References http://blog.altova.com/2010/09/xmlspy-version-2011.html http://www.jpowered.com/ghttp://www.castlehillsberwick.com/playfairexhibition/index_files/Page621.htmraphs-and-charts/bar-chart-history.htm http://ratcliffecollegemedia.wordpress.com/category/tom-roalfe-a2-blog/page/7/ http://www.beaconlearningcenter.com/weblessons/kidshavepets/default.htm

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