Y= negative 2x -7 how do i solve this equation algebraically

Select the correct answer from the drop-down menu. this graph represents the inequality x+2< 4,2x> 3,x+6< 12,2x> 12

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

What situation is an example of an observational study