Students record pressure with a gauge that reads 10 kPa too high at all pressures and obtain the linear relation Pmeas=0.37T+100 (pressures in kPa, temperatures in °C). Extrapolating this relation to Pmeas=0 gives −270 °C for absolute zero. After correcting for the gauge offset, which of the following most nearly gives the true value of absolute zero in Celsius?
a) −297∘C
b) −270∘C
c) −243∘C
d) −257∘C