Liner Plots
                        S = mC + Sbl
where C = conc. of analyte; S = signal of
instrument; m = sensitivity; Sbl = blank signal.
The units of m depend on the instrument, but
include reciprocal concentration.
C (ppm)    A (absorbance)
0.00   0.031
2.00    0.173
6.00    0.422
10.00   0.702
14.00    0.901
18.00    1.113
[C?] `   0.501