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My problem is that both x and y experimental values have significant uncertanties, and I am not sure of how to calculate the estimated uncertainty of the fit parameter, being the relevant result of the experiment.

The data are the following:

x-----------y

B (mT) \ Δν (1/m)

756 \ 61,25

621 \ 47,06

518 \ 45,30

414 \ 33,54

## The Attempt at a Solution

I've been reading a chapter in Press et al. Numerical Recipes on how to perform the same analysis without forcing the intercept. It seems rather difficult, I wonder if it gets any easier if the intercept is forced, since there is only one fit parameter.