MEGA Elementary Education Multi-Content Practice Test

Which type of data is most appropriately represented by a line graph?

1. Comparing sales figures of four regional offices for one month

2. Determining the percent increase in rainfall from one year to the next

3. Seeing the pattern of change in oxygen levels of a lake recorded each month for a year

4. Displaying the number of each category of books sold during a special sale

The correct answer is: Comparing sales figures of four regional offices for one month

A line graph is particularly useful for illustrating data that changes over time, allowing viewers to easily identify trends and patterns. In this context, it is best suited for depicting continuous data, where the relationship between two variables is being observed. Considering the types of data options provided, the scenario involving the pattern of change in oxygen levels of a lake recorded each month for a year aligns perfectly with the characteristics of line graphs. This data involves measurements taken at regular intervals over a specified duration, allowing for a clear visualization of how oxygen levels fluctuate throughout the year. The other options focus on static comparisons or categorical data, which do not lend themselves as effectively to line graph representation. For instance, comparing sales figures of different offices for a single month would be more appropriately visualized using a bar graph since it emphasizes differences between distinct categories rather than changes over time. Similarly, determining the percent increase in rainfall from one year to the next is a comparison between two distinct data points, making it apt for bar or column graphs. Executing a display of the number of each category of books sold during a special sale also suits bar graphs as it revolves around categorical data rather than a time-based change. Thus, the choice highlighting the change in oxygen levels over time is most appropriately