The pressure-time scalar shown in the figure could be caused by which of the following? 
Definitions:
Percentage Change
A mathematical calculation that indicates the degree of change over time as a proportion of the starting value, often expressed as a percentage.
Price Changes
Variations in the cost of goods and services in an economy over a period, affecting inflation or deflation rates.
Excise Tax
A tax levied on specific goods, services, or transactions, often included in the price of the product.
Supply
The total amount of a good or service that is available to consumers, often at various prices.
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