Final answer:
Without the given plot of absorbance vs. concentration, it is not possible to determine which line is the best-fit line based solely on the options (a) blue line, (b) red line, and (c) green line. Best-fit lines are determined by their proximity and fit to the data points.
Step-by-step explanation:
To determine which line is the best-fit line to represent the black data points on a plot of absorbance vs. concentration, one needs to examine the proximity of the lines to the data points. A best-fit line is typically the one that minimizes the total distance between itself and all the data points it represents, often assessed using statistical measures like the least squares method.
Without an actual plot to visually assess, it is not possible to definitively state whether the blue, red, or green line is the best-fit line. An in-depth analysis of the graph and the position of the data points relative to these lines is necessary to make an accurate determination.The question is asking which line on a plot of absorbance vs. concentration is the best-fit line to represent the black data points. To determine the best-fit line, we need to consider which line passes through or is closest to the majority of the black data points.