X  	     Y  
     185.2  	     1.5743  
     214.4  	     1.5339  
     303.4  	     1.4869  
     404.7  	     1.4697  
     546.1  	     1.4602  
     589.3  	     1.4585  
     656.3  	     1.4564  
EQUATION
Y = 3.31*X^0  -  0.0241*X^1  +  0.000135*X^2 
     -  4e-07*X^3  +  6.64e-10*X^4  -  5.79e-13*X^5 
     +  2.07e-16*X^6