Review of Sample 3: There are two problems with the graph itself: neither axis contains the proper unit of measurement labels, and the none of the lines are marked as to what test tube each represents. As with the table in the previous example, the reader needs to know what level of absorbance the results were taken at. Also, the reader has no idea what the lines mean, because he or she has no idea which goes with each tube. Another problem with this figure is that the explanatory sentence is quite scanty. The author doesn't guide the reader along as to what results are being presented. Trends should be pointed out.