# Is the relationship between pressure and volume direct or inverse?

the relationship between pressure and volume a direct or inverse?

### What is the meaning of inverse and direct relationship?

For a direct relationship of the magnitude of an entity to another there is increase in one with the increase of another : Eg: with increase in Pressure, Temperature increases with formula: PV=nRT For inverse relationship, there is decrease in magnitude of one with increase in other. Eg f=1/Time-Period

### How can you know if a graph represents a proportional relationship?

It is a relationship of direct proportion if and only if the graph is a straight line which passes through the origin. It is an inverse proportional relationship if the graph is a rectangular hyperbola. A typical example of an inverse proportions is the relationship between speed and the time taken for a journey.

### How can you tell if a graph has a direct relationship and an inverse relationship?

If the graph shows a direct relationship, then the line will go up. If it shows an inverse relationship, the line will go down. A direct relationship means that as one variable increases, so does the other. On a graph, this means that as we move out along one axis, we also move out along the other. An inverse relationship means that as one variable increases, the other one decreases. So, for example, as we…