What is the nature of graph of PV versus P for a given mass of a gas at constant temperature?

What is the nature of graph of P versus (1/V) for a given mass of gas at constant temperature ?

The graph of PV vs P for a gas is

What is the nature of graph between pressure P and volume V for a gas at constant temperature?

What is the nature of graph between pressure (P) and volume(V)for a given mass of a gas at a fixed temperature ?

At low pressure, the graph of PV vs (1)/(V) for a given amount at a constant temperature for a real gas is:

Figure shows the pressure P versus volume V graphs for a certains mass of a gas at two constant temperature T_(1) and T_(2) . Which of the following interface is correct?

What is the nature of curve by plotting P against PV at constant temperature for a gas ? What is the name assigned to this curve ?