Final answer:
Graphs provide a visual representation of data, which can convey complex information quickly and more understandably than textual descriptions. Different types of graphs, such as pie, bar, and line graphs, are chosen based on the nature of the data and what needs to be emphasized for clear communication to the audience.
Step-by-step explanation:
The reason why a graph might be more helpful in explaining data than just writing the results in words is that graphs provide a visual representation of data, which is option (c). This visual representation can make complex information much more accessible and understandable to many people. A graph can quickly convey trends, patterns, and comparisons that might take much longer to explain in a purely textual format.
Graphs serve to express equations visually and display statistics or data, allowing for an immediate and clear comprehension of the relationships between different datasets. For instance, pie graphs excel at showing how a whole is divided into parts, while bar graphs can effectively reveal the differences in quantities across categories. When presenting data, it's crucial to choose the appropriate type of graph to ensure the message is clearly communicated. The specific selection of a pie graph, bar graph, or line graph should depend on the nature of the data and the information one wishes to highlight.
Furthermore, when deciding on the right graph, various aspects should be considered, such as ensuring legibility in terms of colors, percentages, labels, and overall size. These choices all affect the efficiency and clarity with which the graph conveys its information.