I measured some voltage values ($x$) and some corresponding frequencies ($y$). I know that the voltage can only be measured within an uncertainty $\Delta x$. And the uncertainty of $y$ shall be $\Delta y$.
Now I'm interested in the slope of the regression line and analyze it using root (the statistics tool). I used $x$- and $y$ error bars. Root returns an Error on the slope ($\chi^2$-Method).
Is this the final error on the slope or do I have to make some further propagation of errors?