Solve Math: Help Modeling Data Curve w/Negative Slope

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In my math homework, a problem asks to derive the function of a set of given points. After plotting all the points I realized that the graph is a curve with a negative slope. I have no idea on how to derive a "Best Fit" function that represents the curve. Is there something easy that I am missing?? Please help...
 
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I think this link might be useful:

http://www.bsu.edu/web/jkshim/mathandstat/lsm/leastsquare.htm
 
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You study functions and learn how several of them appear when you study Intermediate Algebra (or even "Elementary Functions"). What does your set of points LOOK LIKE on a cartesian system? This suggests what function to choose for modeling the set of points. Have you reached this far yet?
 
My graph looks like the one in the attachment.
 

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dbell said:
My graph looks like the one in the attachment.

That certainly can cause a delay while approval of the file pends. Do you have another quicker representation of your data? Like I earlier asked, What does your set of points on a cartesian system look like?
 

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