I need help pls and thank you

Hi, the answer is

Explanation: since in the first table it’s 1-3.5 that would be adding 2.5 and in the second table it would be 1-3 and that would be multiplying because
1x3=3
2x3=6 and so on

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.