1. On the graph shown to the right: a. Indicate the abscissa. b. Indicate the ordinate. c. Identify the independent variable. d. Circle the origin. e. Give a title to the graph. f. Calculate the slope. An experimenter discovered that the amount of light a solution absorbs (Absorbance) is proportional to the concentration. Below is a set of typical data. Graph concentration on the x-axis and absorbance on the y-axis on the graph paper provided. Calculate the slope of the line. Use your graph to determine the concentration of a solution whose absorbance is 0.50