The bar graph on the top is a good example of a graph because the labels are visible and clear. It's very easy to read and all the information is given to you. The percentages are on top of the bar which gives an exact answer to what the graph is showing. The bottom graph is a bad example of a bar graph because it is very unorganized. It is very hard to read and the percentages are not above the actual bar.
A good bar graph can really make the reader's life a whole lot easier. The graph's that come within a article must relate to the information that is stated within the page.