It is very easy to use this website just follow this steps :-
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Click on the numbers beside the X-axis label and erase all then write your co-ordinates for X-axis
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Same as X-axis. click on the numbers beside the Y-axis label and erase all then write your co-ordinates for Y-axis
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Click on "Title here" besides the Graph title and write your title. You can also edit axis title in the same way.
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Now click the button "Update Graph" to update the above graph with your given data.