Which type of data representation uses points connected by lines to visualize trends?

The correct answer is a line graph because it effectively uses points connected by lines to show trends over a continuous range of data. This type of visualization is particularly useful for displaying changes over time, allowing viewers to easily observe patterns, increases, or decreases in the data set.

In a line graph, the individual data points represent specific values, and the lines emphasize the relationship between these points, making it simple to identify overall trends at a glance. This representation is especially popular in fields where time series data is analyzed, such as finance, meteorology, and various scientific studies.

Other options, such as a bar chart or histogram, present data in a segmented or categorical manner, which is ideal for comparing discrete quantities but does not emphasize trends in the same way that a line graph does. A table provides raw data in a structured format but lacks the visual trend representation that a line graph offers.