The bar graph quickly compares the sizes of the individual energy source, the heights of the five bars show the values of the five sources. 

The pie chart helps us see what part of the whole each source forms. 

Bar graphs and pie charts help an audience grasp the distribution quickly. 

CY: Gareth, good work! Consider a few comments: 1. In the raw data table, the individual data in the count variable is wrongly typed in; 2. Better to plot a bar graph to show the absolute counts; 3. The labels of marital status in the pie chart is good, what's the 0% in the chart? check to delete / rectify any errors after complete the plotting.

CY: Ann, the colour are so good and showing excellent contrast. Two comments, the colour boxes can be enlarged, my monitor doesn't show apparent difference between the colour of the box used of 'Never married' and 'Widowed'. Where is the bar graph showing the absolute values? 

CY: Ali, not bad at all, the background colour is cool. Better to also plot a bar graph to display the absolute counts as well.

CY: Ben, almost perfect in the bar graph, the colours are good and distinct from each other. Good labels at the top of each bar. two comments: when making screenshot, move away the mouse from the plot and the 'plot area' thing may exclude. The bottom 'Marital status' can be deleted as the title says this already - fully labelled but not over labelled. Where is the pie chart showing the percentage? 

CY: Kad, good try and the shadow make the pie cool. suggestions: also try to plot the absolute counts in a bar graph. I would change the colour in the pie chart to make more distinct on the different individuals. 

CY: Matt, good use of 3D pie! That makes it cool. Consider not to duplicate the labels, the indicators in the pie repeat the legend. Where is the bar graph showing the absolute values? give it a go?

CY: Shereen, almost perfect, the 3D effect makes the pie tasted! I like the table added to the bottom of the bar graph, I would delete the 'Series 1' thing at the bottom. The only improvement would be keeping the colour of individual constant in two plotting, the 'Married' is both red, which is fine. Other status can make the same colours. Well done anyway !

CY: Hossein, very neat and tidy pie, the colour makes me feel it a lemon! All components such as title, percentage labels, legend are there. Where is the bar graph showing the counts for individuals?

CY: Team X or sole Jordan: The pie chart is nicely done with good presentations of the individual percentages. Since the pie is very big, the labels look relatively small, when you insert to a report, you will hardly see the words unless enlarge them. A minor problem, why a grey vertical line is shown at the bottom? Could you also plot the count using a bar graph?

CY: Jordan, Sorry I didn't see you have plotted the bar graph in another spreadsheet, which is good. All the labels and values are given and inclusive. Perhaps the font size could be enlarged. If you try to insert a diagram in a report, the size of the diagram would not excess normally 1/3 of a page, i.e., about 8cm height, can you still clearly read the values on your pie chart / bar graph? That's the way of checking whether the size is fit or not.

CY: Absolutely Fine

CY: Alvin, that's an innovation using dual bar showing both the absolute values and the percentage, which would be better if you add secondary Y axis to the right side, to denote the percentage. Conventionally, pie chart shows percentage, as the whole pie is 100%, people can quickly capture the percentages by the size of the individual components. Bar graph shows good comparisons between different individuals in terms of absolute values.