Which statement correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant?
1. The relationship is inversely proportional; as temperature increases, volume decreases in the same way.
2. The relationship is directly proportional; as temperature increases, volume increases in the same way.
3. The relationship is inversely proportional; as temperature increases, volume increases in the same way.
4. The relationship is directly proportional; as temperature increases, volume decreases in the same way.
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