Which formula is the CORRECT depiction of slope of adiabatic curve?

A

$$\frac{dP}{dV} = -\gamma \frac{P}{V}$$

B

$$\frac{dP}{dV} = \frac{P}{V}$$

C

$$\frac{dP}{dV} = -\frac{P}{V}$$

D

$$\frac{dP}{dV} = \gamma \frac{P}{V}$$