5) Colorimetric determination of phosphorus in urine is prepared by reacting standard solution of phosphate with molybdenum (vi). The measured absorbance A is plotted against the concentration of phosphorus using the table below Conc. of Phosphorus 1.00 2.00 3.00 4.00 Urine staple 0.625 3.00 Absorbance 0.205 0.410 0.615 0.820 Using the least-square line, calculate the phosphorus concentration in the urine sample