Final answer:
A line graph is often used to visualize trends over time, such as in a time series graph. These graphs use lines to show how data changes over a specific period. An example could be a graph that displays the change in the unemployment rate over several years.
Step-by-step explanation:
A visualization that is used to show trends, replacing or complementing lots of numbers, is called a line graph. Line graphs typically use one or more lines to represent how data points change over time, hence showing trends over a given period. These graphs are most effective in illustrating relationships between two variables that are both changing, such as in time series graphs, which depict patterns as time changes.
A common example of a line graph is a time series graph where the horizontal axis shows time and the vertical axis displays another variable. For instance, a line graph may show the unemployment rate in the United States since 1975, with points for the unemployment rate in each year plotted on the graph. This enables clear visualization of how the unemployment rate has fluctuated over the years.
Such visual displays of data are beneficial as they often provide a clearer and more intuitive understanding of the data than tables or raw numbers would. They show the 'whole picture' of the trend at a glance.
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