In protein determination, the color of a dye changes to blue when it binds to protein, and the absorbance of light is measured. The data below were taken to calibrate the instrument. An unknown protein sample gave an absorbance of 0.867. Calculate the mass (micrograms) of protein in the unknown.
Data:
Protein(micrograms)--0.00, 9.37, 18.73, 28.08, 37.44
Absorbance-- 0.490, 0.720, 0.850, 1.110, 1.250