Final Answer:
Between 1984 and 2005, the price level in the United States increased by 88%.
Therefore, option 1) 88% is correct.
Step-by-step explanation:
The percentage increase is the appropriate measure to express the change in the price level over time. The percentage change provides a relative comparison of the price level between two points in time. In this case, the correct answer is 88%, indicating that the price level increased by 88% from 1984 to 2005.
Options 2 and 3 (88 dollars and 88 points) represent absolute changes and are not suitable for expressing the overall percentage increase in the price level. Option 4 (88%) correctly represents the percentage change.
Understanding percentage change is crucial in analyzing inflation, economic trends, and the purchasing power of a currency over time.
Therefore, option 1) 88% is correct.