1.1)
N-M=300-100=200°C
M describes the boiling point of soy beans, m of water.
1.2)
The boiling point is independent of mass/the amount material, so you also know M=100, and N=300
2.1) substance A is solubable in water, because there was always less than 60g left after putting it into the water which means it partially dissolved
2.2) substance A dissolves easier in water at the lower measured temperatures, meaning less material was left behind after the experiment
substance B is not soluable in water at all of the measured temperatures as the complete 60g were always still left in the beaker