Final answer:
The line that determines if a country with a mixed economy is closer to being a pure market or pure command economy is called the economic spectrum.
Step-by-step explanation:
In a mixed economy, the line that determines if a country is closer to being a pure market or pure command economy is called the economic spectrum. The economic spectrum represents a range of potential economic systems, with market economies on one end and command economies on the other end. Most countries have mixed economies, which means they combine elements of both market and command systems to varying degrees.