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How can I find the least-square regression line?

If I was given this data how can I find the least squares regression line:
 
x = 21
 
y= 78
 
sx = 1.5
 
sy= 0.8
 
r=0.81

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Deanna L. | Electrical engineering major and music lover with MIT degreeElectrical engineering major and music l...
4.9 4.9 (122 lesson ratings) (122)
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Vivian,
 
y=a+bx where b=r sx sy.
 
Hope that helps!