A question about uncertainty using a regression line and experimental data

[DanDavies]

Homework Statement

I'm new to uncertainty, so I needed a little assistance. The circuit in this experiment was simple, a dry cell connected to a variable resistor. I used an ammeter on the circuit and used a voltmeter across the resistor and took some measurments.

The experiment was to calculate EMF and Internal resistance using the results we obtained by plotting a VI graph.

The ammeter and voltmeter were digital, their minimum display were 0.01V & 0.01A

Can anyone explain to me how to get the uncertainty for r and for ξ?

Homework Equations

http://img686.imageshack.us/img686/1408/29533548.jpg

If the image doesn't work: http://img686.imageshack.us/img686/1408/29533548.th.jpg

The Attempt at a Solution

100(0.01/(5.83-0.45))+(0.01/(1.35-0.10)) %?

 

[ideasrule]

For calculating uncertainty, you can use this equation:

http://en.wikipedia.org/wiki/Regression_analysis#Linear_regression