help me please i don't understand

Question

The pressure of a gas 𝑃 varies inversely with its volume 𝑉. The pressure of 80 𝐿 of a gas is 7 psi.

1. Write the variation equation for the situation.
2. What is its pressure when the same gas is compressed to a final volume of 50 𝐿?

Answer 1

P α 1/V Pressure (P) is inversely proportional to the Volume (V)

P = (7 psi)(80 L)/(50 L) = 11.2 psi