How do I take results from an exponential saturation curve?

[elevenb]

Homework Statement

I have been working on a lab report recently in which I took some data and then further used this data to gather results.

I was plotting magnetic flux density as a function of current, this turned out to be an exponential saturation curve. I plotted this curve using a package at university.

My question is, do I use my original data points to calculate my results, or do I use the data that the non-linear fit gives me?

Homework Equations

[/B]
Y=b1*(1-exp(-b2*x)) -> My equation for the linear fit

The Attempt at a Solution

I have tried both, the results from the equation seem to give results closer to tabulated values; however I am wondering is this the correct way to go about the experiment.

 

[mfb]

Calculate which results? In general, if the curve is a good fit, using its values is probably more accurate as some measurement uncertainties can average out. In addition, you are not limited to data points - you can use intermediate values as well. If the curve doesn't fit well, do not use it.