I would say option 3 hopefully im right!!
Answer:
proportional relationship
Step-by-step explanation:
proportional relationships are straight lines that go thru the origin
This is a straight line going thru (0,0) so it is a proportional relationship
13 + -6.6=6.4 all I did was subtract 6.4 by 13 and I got 6.6 but then turned it negative to solve the equation