A demand schedule is best defined as:

A demand schedule is fundamentally a table that illustrates the relationship between the price of a good and the quantity demanded by consumers at each price point. It succinctly shows how varying prices influence consumer purchasing decisions. This is crucial in understanding demand, as it provides specific data points that indicate demand behavior.

By presenting a clear outline of how many units of a good consumers wish to purchase at different price levels, the demand schedule helps predict consumer behavior and is instrumental for producers in decision-making regarding production and pricing strategies. Options that describe graphical representations or forecasts do not capture the essence of a demand schedule, which is specifically about detailing quantities demanded at set prices rather than offering a broader overview or analysis.