Answer:
a comparison of the current price of a market basket to a fixed point of reference.
Explanation:
A price index measures how prices change over time. It is a measure of inflation. It compares the current price of a market basket to a fixed point of reference or a base point.
Inflation is a persistent rise in the general price levels
types of price indexes
1. Producer price index measures the goods and services produced. this would not increase because it is used cars that is being examined
2. The consumer price index measures the changes in price of a basket of good. It is used to measure inflation. Because the price of price of used cars and trucks in US has increased , the CPI would increase
CPI = (cost of basket of goods in current period / cost of basket of goods in base period) x 100