10. a) What is the slope of the best-fit line in 9 a)? Provide your answer in the correct units. b) What is the equation of the best-fit line? Refer to Beer's law, 9 b) and 10 a) as you answer this question. c) Using the information from 10 a) and b) ONLY, determine the most probable concentration of a vitamin B12 water solution, with an absorbance of 0.091 (no units) at 362nm, in a 1.00cm cell. a) The above information gives the absorbance of a vitamin B12 solution in water at 362nm, in a 1.00cm cell. Plot its absorbance as a function of concentration, and draw a best-fit line through the data. Use a computer graphing program ONLY to create your graph. Include the equation of the best-fit line on your graph. Attach the graph immediately following this page. b) The best fit line in a) must pass through zero. Why? c) I have a vitamin B12 water solution, with an absorbance of 0.091 (no units) at 362nm, in a 1.00cm cell. Use ONLY the graph and best-fit line from above, in conjunction with this data, to determine the most likely concentration of this sample. (That is, do not use the equation for the best-fit line.) Show your work on the graph, and write your answer on this page, below this line. ahsnrhanre ve measured concentration