To determine the mass of neon contained in a rigid, 2.0 L cylinder, you vary the cylinder’s temperature while recording the reading of a pressure gauge. Your data are as follows:

Temperature (°C)     Pressure gauge (atm)
100 .....................................................6.52
150 .....................................................7.80
200 .....................................................8.83
250 .....................................................9.59

Use the best-fit line of an appropriate graph to determine the mass of the neon.