{"id":75,"date":"2023-08-02T21:11:38","date_gmt":"2023-08-03T01:11:38","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/math0660\/chapter\/bar-graphs\/"},"modified":"2025-02-25T13:59:36","modified_gmt":"2025-02-25T18:59:36","slug":"bar-graphs","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/math0660\/chapter\/bar-graphs\/","title":{"raw":"Topic B: Bar Graphs","rendered":"Topic B: Bar Graphs"},"content":{"raw":"Bar graphs compare quantities<\/strong>. Bar graphs are commonly used to illustrate information in newspapers, in magazine articles, and so on. Bar graphs may be written with the bars arranged vertically or horizontally. Graph 1 is shown both ways \u2013 first with vertical bars and second with horizontal bars.\r\n
\r\n
Steps to Follow When Reading a Bar Graph<\/h6>\r\n
    \r\n \t
  1. Read the title and subtitles so you know what you are looking at.<\/li>\r\n \t
  2. Read the information on the vertical and horizontal axes. Notice that each bar represents a different item.<\/li>\r\n \t
  3. Look carefully at the scale. What unit of measure is being used? The unit of measure will be the same for each bar so that you can compare them.<\/li>\r\n \t
  4. Compare the length or height of each bar to find the information that you want.<\/li>\r\n<\/ol>\r\n<\/div>\r\n

    Graph 1<\/a><\/h2>\r\n
    <\/a>\r\n\"A
    <\/figcaption><\/figure>\r\n
      \r\n \t
    1. How many rivers are shown on this graph?<\/li>\r\n \t
    2. What is the title of the graph?<\/li>\r\n \t
    3. What is the unit of measure?<\/li>\r\n \t
    4. Look at the scale for kilometres. How many kilometres are represented by each division on the page?<\/li>\r\n \t
    5. Which river is the longest? What is its length?<\/li>\r\n \t
    6. Which river is the shortest? What is its length?<\/li>\r\n \t
    7. Name two rivers which are approximately the same length.<\/li>\r\n \t
    8. Compare the Columbia River and the Fraser River.\r\n
        \r\n \t
      1. Which is the longer?<\/li>\r\n \t
      2. Give the approximate difference in their lengths.<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
      3. Give the approximate length of the North Thompson, South Thompson, and Thompson Rivers combined.<\/li>\r\n<\/ol>\r\nAnswers to Graph 1<\/strong>\r\n
          \r\n \t
        1. 12 rivers<\/li>\r\n \t
        2. Lengths of Some British Columbia Rivers<\/li>\r\n \t
        3. Kilometres<\/li>\r\n \t
        4. 250 km<\/li>\r\n \t
        5. Columbia; ~1,950 km<\/li>\r\n \t
        6. Quesnel; ~100 km<\/li>\r\n \t
        7. North Thompson & South Thompson<\/li>\r\n \t
        8. \r\n
            \r\n \t
          1. Columbia<\/li>\r\n \t
          2. ~600 km (1,950 \u2013 1,350)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
          3. ~750 km<\/li>\r\n<\/ol>\r\n

            Graph 2<\/h2>\r\n
            <\/a>\r\n\"A
            <\/figcaption><\/figure>\r\n
              \r\n \t
            1. Give the source of the information for this graph.<\/li>\r\n \t
            2. What is the unit of measure for the population scale?<\/li>\r\n \t
            3. What number of people is represented by each section on the scale?<\/li>\r\n \t
            4. \r\n
                \r\n \t
              1. Which country had the largest population?<\/li>\r\n \t
              2. What was the approximate population of this country?<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
              3. Name the two countries which were the closest in population size.<\/li>\r\n \t
              4. What was the approximate population of Bangladesh?<\/li>\r\n \t
              5. What was the approximate population of India?<\/li>\r\n<\/ol>\r\nAnswers for Graph 2<\/strong>\r\n
                  \r\n \t
                1. United Nations<\/li>\r\n \t
                2. In the millions<\/li>\r\n \t
                3. 50 million<\/li>\r\n \t
                4. \r\n
                    \r\n \t
                  1. China<\/li>\r\n \t
                  2. 1,354,000,000<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                  3. Nigeria and Bangladesh<\/li>\r\n \t
                  4. 164,000,000<\/li>\r\n \t
                  5. 1,214,000,000<\/li>\r\n<\/ol>\r\n \r\n\r\nBar graphs can show more than one type of information for each item. These graphs are useful for making comparisons. The bars are usually shaded or coloured differently and a legend will be placed near the graph. The bar graphs must still all use the same unit of measure.\r\n

                    Graph 3<\/h2>\r\n
                    <\/a>\r\n\"A
                    <\/figcaption><\/figure>\r\n
                      \r\n \t
                    1. What is the subtitle?<\/li>\r\n \t
                    2. Look at the legend. The grey bars give each country\u2019s population for what year? The patterned bar gives the population for these same countries in what year?<\/li>\r\n \t
                    3. What trend does the graph show?<\/li>\r\n \t
                    4. \r\n
                        \r\n \t
                      1. Which country had the largest increase in population? (this means, which country\u2019s population went up by the highest number)<\/li>\r\n \t
                      2. About how much was that increase?<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                      3. \r\n
                          \r\n \t
                        1. Which country had the least change in population?<\/li>\r\n \t
                        2. About how much was that change?<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\nAnswers for Graph 3<\/strong>\r\n
                            \r\n \t
                          1. Year 2010 and Year 1950<\/li>\r\n \t
                          2. 2010, 1950<\/li>\r\n \t
                          3. That countries around the world are growing in population<\/li>\r\n \t
                          4. \r\n
                              \r\n \t
                            1. India<\/li>\r\n \t
                            2. The increase was 843 million<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                            3. \r\n
                                \r\n \t
                              1. Pakistan<\/li>\r\n \t
                              2. The increase was 108 million<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>","rendered":"

                                Bar graphs compare quantities<\/strong>. Bar graphs are commonly used to illustrate information in newspapers, in magazine articles, and so on. Bar graphs may be written with the bars arranged vertically or horizontally. Graph 1 is shown both ways \u2013 first with vertical bars and second with horizontal bars.<\/p>\n

                                \n
                                Steps to Follow When Reading a Bar Graph<\/h6>\n
                                  \n
                                1. Read the title and subtitles so you know what you are looking at.<\/li>\n
                                2. Read the information on the vertical and horizontal axes. Notice that each bar represents a different item.<\/li>\n
                                3. Look carefully at the scale. What unit of measure is being used? The unit of measure will be the same for each bar so that you can compare them.<\/li>\n
                                4. Compare the length or height of each bar to find the information that you want.<\/li>\n<\/ol>\n<\/div>\n

                                  Graph 1<\/a><\/h2>\n
                                  <\/a>
                                  \n\"A
                                  <\/figcaption><\/figure>\n
                                    \n
                                  1. How many rivers are shown on this graph?<\/li>\n
                                  2. What is the title of the graph?<\/li>\n
                                  3. What is the unit of measure?<\/li>\n
                                  4. Look at the scale for kilometres. How many kilometres are represented by each division on the page?<\/li>\n
                                  5. Which river is the longest? What is its length?<\/li>\n
                                  6. Which river is the shortest? What is its length?<\/li>\n
                                  7. Name two rivers which are approximately the same length.<\/li>\n
                                  8. Compare the Columbia River and the Fraser River.\n
                                      \n
                                    1. Which is the longer?<\/li>\n
                                    2. Give the approximate difference in their lengths.<\/li>\n<\/ol>\n<\/li>\n
                                    3. Give the approximate length of the North Thompson, South Thompson, and Thompson Rivers combined.<\/li>\n<\/ol>\n

                                      Answers to Graph 1<\/strong><\/p>\n

                                        \n
                                      1. 12 rivers<\/li>\n
                                      2. Lengths of Some British Columbia Rivers<\/li>\n
                                      3. Kilometres<\/li>\n
                                      4. 250 km<\/li>\n
                                      5. Columbia; ~1,950 km<\/li>\n
                                      6. Quesnel; ~100 km<\/li>\n
                                      7. North Thompson & South Thompson<\/li>\n
                                      8. \n
                                          \n
                                        1. Columbia<\/li>\n
                                        2. ~600 km (1,950 \u2013 1,350)<\/li>\n<\/ol>\n<\/li>\n
                                        3. ~750 km<\/li>\n<\/ol>\n

                                          Graph 2<\/h2>\n
                                          <\/a>
                                          \n\"A
                                          <\/figcaption><\/figure>\n
                                            \n
                                          1. Give the source of the information for this graph.<\/li>\n
                                          2. What is the unit of measure for the population scale?<\/li>\n
                                          3. What number of people is represented by each section on the scale?<\/li>\n
                                          4. \n
                                              \n
                                            1. Which country had the largest population?<\/li>\n
                                            2. What was the approximate population of this country?<\/li>\n<\/ol>\n<\/li>\n
                                            3. Name the two countries which were the closest in population size.<\/li>\n
                                            4. What was the approximate population of Bangladesh?<\/li>\n
                                            5. What was the approximate population of India?<\/li>\n<\/ol>\n

                                              Answers for Graph 2<\/strong><\/p>\n

                                                \n
                                              1. United Nations<\/li>\n
                                              2. In the millions<\/li>\n
                                              3. 50 million<\/li>\n
                                              4. \n
                                                  \n
                                                1. China<\/li>\n
                                                2. 1,354,000,000<\/li>\n<\/ol>\n<\/li>\n
                                                3. Nigeria and Bangladesh<\/li>\n
                                                4. 164,000,000<\/li>\n
                                                5. 1,214,000,000<\/li>\n<\/ol>\n

                                                   <\/p>\n

                                                  Bar graphs can show more than one type of information for each item. These graphs are useful for making comparisons. The bars are usually shaded or coloured differently and a legend will be placed near the graph. The bar graphs must still all use the same unit of measure.<\/p>\n

                                                  Graph 3<\/h2>\n
                                                  <\/a>
                                                  \n\"A
                                                  <\/figcaption><\/figure>\n
                                                    \n
                                                  1. What is the subtitle?<\/li>\n
                                                  2. Look at the legend. The grey bars give each country\u2019s population for what year? The patterned bar gives the population for these same countries in what year?<\/li>\n
                                                  3. What trend does the graph show?<\/li>\n
                                                  4. \n
                                                      \n
                                                    1. Which country had the largest increase in population? (this means, which country\u2019s population went up by the highest number)<\/li>\n
                                                    2. About how much was that increase?<\/li>\n<\/ol>\n<\/li>\n
                                                    3. \n
                                                        \n
                                                      1. Which country had the least change in population?<\/li>\n
                                                      2. About how much was that change?<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

                                                        Answers for Graph 3<\/strong><\/p>\n

                                                          \n
                                                        1. Year 2010 and Year 1950<\/li>\n
                                                        2. 2010, 1950<\/li>\n
                                                        3. That countries around the world are growing in population<\/li>\n
                                                        4. \n
                                                            \n
                                                          1. India<\/li>\n
                                                          2. The increase was 843 million<\/li>\n<\/ol>\n<\/li>\n
                                                          3. \n
                                                              \n
                                                            1. Pakistan<\/li>\n
                                                            2. The increase was 108 million<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n","protected":false},"author":1935,"menu_order":2,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-75","chapter","type-chapter","status-publish","hentry"],"part":64,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/pressbooks\/v2\/chapters\/75","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/wp\/v2\/users\/1935"}],"version-history":[{"count":9,"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/pressbooks\/v2\/chapters\/75\/revisions"}],"predecessor-version":[{"id":501,"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/pressbooks\/v2\/chapters\/75\/revisions\/501"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/pressbooks\/v2\/parts\/64"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/pressbooks\/v2\/chapters\/75\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/wp\/v2\/media?parent=75"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/pressbooks\/v2\/chapter-type?post=75"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/wp\/v2\/contributor?post=75"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math0660\/wp-json\/wp\/v2\/license?post=75"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}