Based on the significance of graph comprehension within statistical literacy, we present the findings of a study that took place in a Second Chance School in Greece. Our aim was to assess the progress of adults' comprehension of graphs. In order to offer to our adult students tasks with realistic context we used graphs, published in the media, some of them being potentially misleading. Our results showed that some of the adults have managed to move from the mere reading of the graphs to their interpretation. However, their critical sense was not so well developed since they often based their interpretations on their dispositions and not on their statistical knowledge.