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What is the best way to graph an observed melting point versus its theoretical? Should I...

What is the best way to graph an observed melting point versus its theoretical? Should I use a scatter plot or a bar graph to represent the range in temperature of a compound melting?
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* By measuring the various melting points of several known compounds with sharp melting point you can find a relationship between the observed and theoretical melting point.Then you plot observed melting point to the x-axis and theoretical melting point to the y-axis.Now find your measure temperature in the x-axis and also look for the corresponding actual i.e. theoretical melting point in the y-axis.

** With scatter plot we can plot a variable with an invariable if we only have single value.But in case of melting point range as it not a single value,we can not use scatter plot,here you should use a bar graph to represent the range in temperature of a compound melting.

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