these graphs are useful as they can show the info needed and can clearly show what is most popular and what is most viewed and what is least popular, and this is a lot easier to show data than just looking at numbers.
surveys are useful because they allow people to answer questions related to their studies, such as a supermarket asking its customers about their shopping. it allows companies to find out what people find desirable about their company and what they don't like so they can make it better. surveys are also useful because they can be filled out either on paper or online, so if people don't have the time to while working or are busy at the time, then they can go home and they can do it online. I also did this survey online, so people can fill it in whenever they want.
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