Which of the following graphs represents y=x-2

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Can someone me do math because i am having a breakdown rn because i don’t get it

Ok a point t on a segment with endpoints d(1, 4) and f(7, 1) partitions the segment in a 2: 1 ratio. find t. you must show all work to receive credit.