In line graphs, the line is created by connecting each individual data point to show local changes, in this way, the local change from point to point can be seen. ![]() The difference between these two formats is how the line is created. "Line graphs and scatterplots are similar in that they record individual data values as marks on a graph. Some experts recommend no more than 4 lines on a single graph any more than that and it becomes difficult to interpret. ![]() When comparing data sets, line graphs are only useful if the axes follow the same scales. They can also be used to display several dependent variables against one independent variable. ![]() Line graphs are useful in that they show data variables and trends very clearly and can help to make predictions about the results of data not yet recorded. Others feel a monthly measurement is sufficient, even though the line implies data at points where no measurement was taken. ![]() Some say the data must be measured nearly continually in order for the lines to be accurate representations. time) and the dependent data are on the vertical y-axis. Line graphs are used to track changes over short and long periods of time. There is some debate about the degree of measurement between time points. Line graphs are drawn so that the independent data are on the horizontal a-axis (e.g.
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