Chapter $1$ and Appendix A ideas are used in this question

The following calibration data were recorded for $Pb$ in water by graphite furnace atomic absorption spectrometry:

$\backslash$table$[[Pb(n\frac{g}{m}L),$Signal$],[0\mathrm{.}00,0\mathrm{.}034+-0\mathrm{.}003$