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Home >> Graphs >> Double Bar Graph >> Double Bar Graph
We hope that you are familiar with Bar Graph and if not, this topic is already here Bar Grap
A single or simple bar graph usually represents value to a single set of data. But when we need to represent and compare two sets of data, we need Double Bar Graphs.
Following example further illustrates Double Bar Graphs.
Example – Temperature of two cities X & Y for entire week is represented in the following tabular form.
Temperature  Mon  Tue  Wed  Thu  Fri  Sat  Sun  City X  27  28  30  31  29  31  27  City Y  30  29  30  29  28  32  28 
Draw a double bar graph and answer the following questions:<
1) On which day the temperature of both cities is same ?
2) On which day there is maximum difference in temperature of both cities ?
3) On which day there is least difference in temperature of both cities ?
4) Hottest and coldest days(s) for both cities ?
Answer – Below is the required Double Bar Graphs representing temperature of City X and City Y from Monday to Sunday:
Below are answers to questions:
Question 1  On which day the temperature of both cities is same ?
Answer  The temperature of city X and Y is same on Wednesday i.e 30 degrees
Question 2  On which day there is maximum difference in temperature of both cities ?
Answer  Maximum difference in temperature of both the cities is on Thursday i.e. 7 degrees difference
Question 3  On which day there is least difference in temperature of both cities ?
Answer  Least difference in temperature of both the cities is on Tuesday i.e. 1 degree difference only.
Question 4  Hottest and coldest days(s) for both cities ?
Answer 
Hottest Day for City X = Monday i.e. 35 Degrees
Hottest Day for City Y = Wednesday i.e. 30 Degrees
Coldest Day for City X = Sunday i.e. 25 Degrees
Coldest Days for City Y = Thursday & Friday Sunday i.e. 25 Degrees each.


