If we double the value on the x-axis we get 2, and this corresponds to 0.5 on the y-axis. This confirms that the graph shows inverse proportionality as when one variable doubles, the other one halves.

The graph of an inverse demand curve is derived from the formula used to determine the demand curve for a product. Advertisement. Article continues below this ad. How to Use an Inverted Demand Curve.

GCSE; Graphs - WJEC Direct and inverse proportion. Graphs can be used to present data clearly and as a tool to aid calculations in the form of conversion graphs and travel graphs.