text: • Home
  • /
  • Blog
  • /
  • How to Make Double Bar Graph – Definition, Advantages & Examples
  
  # How to Make Double Bar Graph – Definition, Advantages & Examples
  
  October 19, 2022
  
  This post is also available in: हिन्दी (Hindi)
  
  If you want to present the math marks obtained by students in a class graphically, then a bar graph will always be a good choice as it helps in comparing the data visually. But if you want to present marks obtained in one more subject and want to compare it with the marks obtained in math, then the choice will be a double bar graph.
  
  Let’s understand what is a double bar graph and how is it read and drawn using examples.
  
  ## What is a Double Bar Graph?
  
  A double bar graph is a graphical display of information using two bars beside each other at various heights. The bars can be arranged vertically or horizontally. We use a double bar graph to compare two data groups.
  
  Similar to a bar graph, a double bar graph is also drawn over two axes. The $x$-axis of a double bar graph shows the categories being compared, and the $y$-axis represents the scale. A scale is a set of numbers that represents the data organized into equal intervals. The title of the double bar graph provides a general overview to the reader of what is being measured and compared. A double bar graph also has a key. The key for a double bar graph represents the groups being compared with two separate colours or shades.
  
  The graph shown below is a vertical double bar graph.
  
  The double bar graph can also be a horizontal double bar graph. In the case of a horizontal double bar graph, the $x$-axis represents the scale showing the data and the $y$-axis shows the categories being compared.
  
  Is your child struggling with Maths?
  We can help!
  Country
  • Afghanistan 93
  • Albania 355
  • Algeria 213
  • American Samoa 1-684
  • Andorra 376
  • Angola 244
  • Anguilla 1-264
  • Antarctica 672
  • Antigua & Barbuda 1-268
  • Argentina 54
  • Armenia 374
  • Aruba 297
  • Australia 61
  • Austria 43
  • Azerbaijan 994
  • Bahamas 1-242
  • Bahrain 973
  • Belarus 375
  • Belgium 32
  • Belize 501
  • Benin 229
  • Bermuda 1-441
  • Bhutan 975
  • Bolivia 591
  • Bosnia 387
  • Botswana 267
  • Bouvet Island 47
  • Brazil 55
  • British Indian Ocean Territory 246
  • British Virgin Islands 1-284
  • Brunei 673
  • Bulgaria 359
  • Burkina Faso 226
  • Burundi 257
  • Cambodia 855
  • Cameroon 237
  • Cape Verde 238
  • Caribbean Netherlands 599
  • Cayman Islands 1-345
  • Central African Republic 236
  • Chile 56
  • China 86
  • Christmas Island 61
  • Cocos (Keeling) Islands 61
  • Colombia 57
  • Comoros 269
  • Congo - Brazzaville 242
  • Congo - Kinshasa 243
  • Cook Islands 682
  • Costa Rica 506
  • Croatia 385
  • Cuba 53
  • Cyprus 357
  • Czech Republic 420
  • Denmark 45
  • Djibouti 253
  • Dominica 1-767
  • Egypt 20
  • Equatorial Guinea 240
  • Eritrea 291
  • Estonia 372
  • Ethiopia 251
  • Falkland Islands 500
  • Faroe Islands 298
  • Fiji 679
  • Finland 358
  • France 33
  • French Guiana 594
  • French Polynesia 689
  • French Southern Territories 262
  • Gabon 241
  • Gambia 220
  • Georgia 995
  • Germany 49
  • Ghana 233
  • Gibraltar 350
  • Greece 30
  • Greenland 299
  • Guam 1-671
  • Guatemala 502
  • Guernsey 44
  • Guinea 224
  • Guinea-Bissau 245
  • Guyana 592
  • Haiti 509
  • Heard & McDonald Islands 672
  • Honduras 504
  • Hong Kong 852
  • Hungary 36
  • Iceland 354
  • India 91
  • Indonesia 62
  • Iran 98
  • Iraq 964
  • Ireland 353
  • Isle of Man 44
  • Israel 972
  • Italy 39
  • Jamaica 1-876
  • Japan 81
  • Jersey 44
  • Jordan 962
  • Kazakhstan 7
  • Kenya 254
  • Kiribati 686
  • Kuwait 965
  • Kyrgyzstan 996
  • Laos 856
  • Latvia 371
  • Lebanon 961
  • Lesotho 266
  • Liberia 231
  • Libya 218
  • Liechtenstein 423
  • Lithuania 370
  • Luxembourg 352
  • Macau 853
  • Macedonia 389
  • Malawi 265
  • Malaysia 60
  • Maldives 960
  • Mali 223
  • Malta 356
  • Marshall Islands 692
  • Martinique 596
  • Mauritania 222
  • Mauritius 230
  • Mayotte 262
  • Mexico 52
  • Micronesia 691
  • Moldova 373
  • Monaco 377
  • Mongolia 976
  • Montenegro 382
  • Montserrat 1-664
  • Morocco 212
  • Mozambique 258
  • Myanmar 95
  • Namibia 264
  • Nauru 674
  • Nepal 977
  • Netherlands 31
  • New Caledonia 687
  • New Zealand 64
  • Nicaragua 505
  • Niger 227
  • Nigeria 234
  • Niue 683
  • Norfolk Island 672
  • North Korea 850
  • Northern Mariana Islands 1-670
  • Norway 47
  • Oman 968
  • Pakistan 92
  • Palau 680
  • Palestine 970
  • Panama 507
  • Papua New Guinea 675
  • Paraguay 595
  • Peru 51
  • Philippines 63
  • Pitcairn Islands 870
  • Poland 48
  • Portugal 351
  • Puerto Rico 1
  • Qatar 974
  • Romania 40
  • Russia 7
  • Rwanda 250
  • Samoa 685
  • San Marino 378
  • Saudi Arabia 966
  • Senegal 221
  • Serbia 381 p
  • Seychelles 248
  • Sierra Leone 232
  • Singapore 65
  • Slovakia 421
  • Slovenia 386
  • Solomon Islands 677
  • Somalia 252
  • South Africa 27
  • South Georgia & South Sandwich Islands 500
  • South Korea 82
  • South Sudan 211
  • Spain 34
  • Sri Lanka 94
  • Sudan 249
  • Suriname 597
  • Svalbard & Jan Mayen 47
  • Swaziland 268
  • Sweden 46
  • Switzerland 41
  • Syria 963
  • Sao Tome and Principe 239
  • Taiwan 886
  • Tajikistan 992
  • Tanzania 255
  • Thailand 66
  • Timor-Leste 670
  • Togo 228
  • Tokelau 690
  • Tonga 676
  • Tunisia 216
  • Turkey 90
  • Turkmenistan 993
  • Turks & Caicos Islands 1-649
  • Tuvalu 688
  • U.S. Outlying Islands
  • U.S. Virgin Islands 1-340
  • UK 44
  • US 1
  • Uganda 256
  • Ukraine 380
  • United Arab Emirates 971
  • Uruguay 598
  • Uzbekistan 998
  • Vanuatu 678
  • Vatican City 39-06
  • Venezuela 58
  • Vietnam 84
  • Wallis & Futuna 681
  • Western Sahara 212
  • Yemen 967
  • Zambia 260
  • Zimbabwe 263
  • Less Than 6 Years
  • 6 To 10 Years
  • 11 To 16 Years
  • Greater Than 16 Years
  
  ## How to Read a Double Bar Graph
  
  The different steps to read a double bar graph are given below:
  
  Step 1: Check whether the given double bar graph is a horizontal double bar graph or a vertical double bar graph.
  
  Step 2: In the case of a vertical double bar graph, the categories are present on the horizontal axis (or x-axis) and the data values are represented by the vertical bars(or rectangles).
  
  In the case of a horizontal double bar graph, the categories are present on the vertical axis (or y-axis) and the data values are represented by the horizontal bars(or rectangles).
  
  Step 3: For each category,
  
  In the case of a vertical double bar graph note down the point on the $y$-axis corresponding to the height of a vertical bar
  
  In the case of a horizontal double bar graph note down the point on the $x$-axis corresponding to the length of a horizontal bar
  
  ### Examples
  
  Let’s consider an example to understand how to read a double bar graph.
  
  Ex 1: Observe the bar graph and answer the following questions.
  
  • Which is the least preferred sport of the girls?
  • Which is the most preferred sport of the boys?
  • How many girls like cricket?
  • Which sport is liked by 10 girls?
  • How many students like basketball?
  
  The smallest bar corresponding to girls is football, therefore, the least preferred sport of girls is football.
  
  The largest bar corresponding to boys is cricket, therefore, the most preferred sport of boys is cricket.
  
  The number of girls liking cricket is 20.
  
  Students include both boys and girls.
  
  The number of boys liking basketball is 20 and the number of girls liking basketball is 25. Therefore, the number of students liking basketball is 45(20 + 25).
  
  ## How to Make a Double Bar Graph?
  
  Let’s now understand how to make a double bar graph. To make a double bar graph, the steps are:
  
  Step 1: Make a data-filled table
  
  Step 2: Draw the horizontal axis and vertical axis. (For example, Favourite Food)
  
  Step 3: Now, label the horizontal axis.
  
  Step 4: Write the names on the horizontal axis, such as Pizza, Noodles, Pasta, and Burger.
  
  Step 5: Now, label the vertical axis. (For example, Number of Students)
  
  Step 6: Finalise the scale range for the given data. Since the number 45 is the highest value while 0 is the lowest. This graph should be scaled such that 1 unit equals 5 students.
  
  Step 7: Finally, draw the bar graphs that should represent each category of the fruit with their respective numbers.
  
  ### Examples
  
  Ex 1: Given below is the data showing the favorite fast food of boys and girls of a class. Draw a Double Bar graph representing the given information.
  
  The first step is deciding the title of the bar graph. Let’s name our bar graph “Favourite Fast Food of Students”.
  
  Next, draw the axes.
  
  The horizontal axis represents the activity and the vertical axis represents the number of students.
  
  To choose an appropriate scale, note down the minimum and maximum values in the data set.
  
  The minimum value (Number of boys for pasta = 10)
  
  The maximum value (Number of boys for noodles = 35)
  
  Since the maximum value is 35 and the minimum 10, so let’s mark the maximum point on the vertical axis as 35 starting from 0 with equal intervals of 5. This will fit all the values properly in the bar graph.
  
  Finally, draw the bar graph that should represent each category of the activity with their respective numbers.
  
  ## Practice Problems
  
  Draw a Double Bar Graph to compare the favorite ice cream flavors of girls and boys in a class.
  
  Draw a double bar graph to compare the marks of the students in practice tests and tests.
  
  Draw a double bar graph to compare the number of boys and girls in different classes.
  
  ## FAQs
  
  ### What is a double bar graph?
  
  A double bar graph is a graphical display of information using two bars beside each other at various heights. The bars can be arranged vertically or horizontally. We use a double bar graph to compare two data groups.
  
  ### What is the difference between a bar and a double bar graph?
  
  A bar graph is a graphical display of data using single bars of various heights. A double bar graph is a graphical display of information using two bars beside each other at various heights. The bars can be arranged vertically or horizontally. We can use a double bar graph to compare two data groups.
  
  ### Why double bar graph important?
  
  Double bar Graph helps us to compare two data groups. For example, we want to compare the marks obtained by boys and girls separately in class in different subjects.
  
  ## Conclusion
  
  A double bar graph is a graphical display of information using two bars beside each other at various heights. The bars can be arranged vertically or horizontally. Its importance lies in the fact that it facilitates the comparison of two different categories.