Matlab: Linear Regression - Get Variance of Slope & Y-Component

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i need to get the variance of the slope and the y-component for the fitted line of a given set od data...
please,someone help me,it is beyond me
 

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When I did a Google search for 'matlab linear regression statistics', I got this on the first page:
http://www.swarthmore.edu/NatSci/echeeve1/Ref/Matlab/CurveFit/LinearCurveFit.html

(Linear Regression with MATLAB)

More documentation at MATLAB's Documentation Site:
http://www.mathworks.com/access/helpdesk/help/techdoc/data_analysis/f1-15377.html
 
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