Index Value Plot Graph

http://www.investing-in-mutual-funds.com/time-value-of-money.html

The graph above is an example of an Index Value Plot Graph. With these kinds of graph, variables are plotted against or as a measure of an index value, which is usually a measure of something. For instance, the map of above shows the actual return rates recorded by a company according to its index and is connected by a red line. The blue line shows the return rates if they were more constant. Similarly to line graphs, index value plots show values over a measure of time, as this map shows return rates from 1951 to 2007. This type of map is useful for comparing actual values with expected or measured values.