This graph represents the return on an investment of 100 units. The red line
represents the inflation rate and the blue one the rate of the instrument.
The total return at the end of the year shown in the horiziontal axis
is shown on the vertical axis at the right of the graph.
Set the 'annotate' option to see the values for every year.
Move the red and blue lines to see how the return changes as the rate and inflation change.