How do I quickly and easily interpolate a point on a chart without given data?

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To interpolate a point on a chart without given data, represent the two boundary points as a line on a Cartesian graph. Use basic algebra to derive the equation of the line, which allows for finding the missing coordinate. While some interpolation methods may not always yield accurate results, understanding the underlying principles can help. Resources like Wikipedia and specific engineering documents can provide additional guidance. Mastering these techniques is crucial for efficiently handling data in thermodynamics tests.
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I completely forgot how to do this. I have a thermo test coming up and i will be interpolating a lot of data. What is the fastes/easiest way to interpolate a point on a chart not given?
 
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yea already looked at that...The first eq. on this site is much easier but someitmes it does not work http://engineering.union.edu/~brunob/mer026/Thermo%20intro%20interpolation.doc
 
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usfz28 on linear interpolation said:
someitmes it does not work
when is that?
 
Think of how the data would appear on a cartesian graph. Represent the two boundary points as a line. You only need simple elementary algebra about equations for a line to find the missing coordinate.
 

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