Final answer:
To show changes over time, you would use a line chart. Line graphs are the most appropriate for demonstrating trends and the evolution of data points across different time intervals.
Step-by-step explanation:
To show changes over time, you would use a line chart. Line graphs are very effective in displaying information because they show trends and changes over a given period. They typically use one or more lines to illustrate how data points have evolved.
Comparing line graphs with pie charts and bar graphs, it's clear that each type serves a different purpose. Pie charts are generally better for showing how a whole is divided into parts, but can be challenging to interpret if there are too many slices. Bar graphs, on the other hand, are useful for comparing different categories but can also be used to show changes over time when the data is appropriate. However, for continuous data sets and specifically for tracking changes over periods, line graphs are superior.
It's crucial to choose the right graph based on the kind of data you have and what you want to represent. Line graphs are the most helpful for visualizing changes in quantitative values over time, such as changes in population, stock prices, or temperature readings.