so basically the temperature is the product of P and V>?
actually the product PV is constant at a constant temperature
temperature is not equal to the gradient
it is CONSTANT
as temperature remains constant the same amount of energy given to the system persists throughout its operation and therefore, theoretically, the value of (PV) k will remain constant
however, at a higher constant temperature the product PV will also increase therefore, there is a difference in the gradients