Final answer:
Devaluation of the bolivar by the Venezuelan government artificially increases the bolivars required to purchase one US dollar, signaling government intervention rather than a free-floating exchange rate determined by supply and demand.
Step-by-step explanation:
When the President of Venezuela devalues the bolivar, the effect is to artificially increase the number of bolivars needed to buy one US dollar. This means that the exchange rate has been changed not through the natural market dynamics of supply and demand, but through direct intervention by the government. This kind of intervention can be seen in economies which maintain a fixed exchange rate, where the government uses market mechanisms such as monetary policy or currency reserves to maintain their desired exchange rate, opposed to allowing it to freely float and be determined by market forces.