Question

This experiment deals with the relationship between volume and temperature for a fixed amount of gas at constant pressure. Design an experiment, which would allow you to study the relationship between pressure and temperature for a fixed amount of gas at constant volume. Show a diagram of the apparatus and a plot of P versus T for the data you expect to obtain. Is the relationship between P and T direct or inverse? ...?

Answer 1

Your experiment should keep one thing constant and measure the other. So vary the temp and measure the pressure. You will get a set of data that relates pressure with temp.
PV = nRT
So
P and T are directly proportional.
These experiments are one of either Boyle-Mariottte's, Gay-Lussac'a or Charles' law.