Final answer:
A Bubble chart (Option D) best fits the description as it is like a scatter chart but also compares three data variables, with the third variable represented by the bubble size.
Step-by-step explanation:
The correct answer to the question is indeed D. Bubble chart. A bubble chart is similar to a scatter chart but differs by comparing three data variables, where the size of the bubble represents the third data variable, in addition to the X and Y-axis values. For instance, Figure A7 and Figure A8 can show how bars represent countries or years, with the vertical axis representing numerical or percentage values. However, bar graphs are suited for comparing size, quantity, rates, distances, and other quantitative categories. Unlike bar graphs, bubble charts provide a visual display of three dimensions of data.
When selecting the type of graph to use, it's crucial to consider what is most effective in representing the data. Pie charts are great for showing how a whole is divided into proportions, particularly when there are not too many categories to avoid clutter. On the other hand, line graphs are excellent for showing trends over time. Bubble charts can be particularly useful when we want to illustrate the relationship between two quantitative variables while also representing the size of a third variable.