A proportional relationship is one that as one value changes, the other one does too, so that the relationship between the values is the same.
1 cup butter/2 cups sugar is proportional to 3 cups butter/6 cups sugar, becuase 1/2=3/6.
2a: No, these do not change at the same rate. There is no common ratio of the L and x values.
2b: Yes, the t values is always 108/100 of the P value. No matter the P value, this relationship will be maintained.
