Final answer:
Nico will need to carefully select categories for his multiple pie charts to ensure clarity and effective data representation. He must avoid too many small slices and ensure consistency across the charts for easy comparison. Additionally, he should be mindful of presentation choices that could influence data interpretation.
Step-by-step explanation:
If Nico wants to work with multiple pie charts, he will need to decide on the categories or segments that each chart will represent. Since pie charts are useful for showing how a group is divided into parts, he must ensure that the categories make sense for the data he is trying to present and that they are not too numerous, as too many slices can make the chart difficult to read. When creating multiple pie charts, consistency in the categories between charts will make it easier to compare data across them. Also, he should be mindful of "presentation choices" such as the relative size of the slices, which could influence the interpretation of the data.
Pie charts can often be more effective than line graphs at illustrating proportions within a whole, but it's crucial to avoid having too many small slices, as this can confuse the audience. When comparing data over time or among different groups, line graphs or bar graphs might be more appropriate. For bar graphs, adjusting the scale of the vertical axis can emphasize or deemphasize variations, so careful consideration is needed here as well.