The graph represents the relationship between the number of tabelspoons of sugar in the bowl and the total weight of the bowl. Which point on the graph could represent your answer to the previous question?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

What is always true when two whole numbers are subtracted?

Having a hard time understanding this question (see attachment).