

Astronomy 23/223 InClass Exercise:
In this exercise, we will calculate the age of the igneous rocks that make up the oldest parts of the Moon, which are the anorthosites in the highland areas. The dates we will use came from a paper by Papanastassiou and Wasserburg (1972).  
Determine the age of these inclusions by filling in the following worksheet. 

Linear Regression the OldFashioned
Way 



= ________ = _________ = average X = ________ = average Y = ________ = _________ = ________ = ________ 

Now, solve either form of the following two equations, and you'll know the equations of your line! 



Equation for regression line is: Y = slope · X + intercept 
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