A Graph Shows That the Number of U

question 47

Multiple Choice

A graph shows that the number of U.S. tourists visiting a Caribbean island increases as the temperature in the northeastern United States falls. The graph shows

• A)a positive relationship.
• B)a direct relationship.
• C)an invalid relationship.
• D)no relationship.
• E)a negative relationship.

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Definitions:

Vaporized

Turned into vapor, typically through the application of heat, changing from a liquid or solid state into a gaseous state.

Gas Chromatograph

A gas chromatograph is an analytical instrument used to separate, analyze, and identify compounds in a gaseous sample based on their different boiling points.

Boiling Points

The temperature at which a substance transitions from the liquid phase to the gas phase under standard atmospheric pressure.

Retention Time

The time taken for a substance to travel through a chromatography column to the detector, a critical parameter for identifying substances in the mix.