increases or decreasing volume of a gas what happens to pressure? is this a direct or indirect relationship?

Answer 1

Yes, it's a direct relationship but an inverse one. If you increase the pressure, you will decrease the volume, and vice versa. You can use P1/V1 = P2/V2 to see this.

P1 = initial pressure

V1 = initial volume

P2 = final pressure

V2 = final volume