Cross sectional graphs take many forms.

We can look at the same economic relationships using different types of graphs and using different types of data. For example, consider the relationship between family consumption and family income. In general, we expect consumption to increase as income increases. We might use a time-series graph to plot both consumption and income over time. In this case, we would expect that as income when up over time -- so would consumption.

Or alternatively, we might take a number of households and look at their consumption and income during a given year and plot the information on a cross sectional graph.