In the wichita tribe, relationships were traced through women in the family because the society was (a) patriarchal (b) matrilineal

The correct answer is - (B) Matrilineal.

The term matrilineality means the tracing of the origin/descent through the female line, not the male one as it usually is practiced. This can also be correlated with a social system in which the people are identifying in accordance to their mother's lineage, which usually means that it is a matriarchal society. In this types of societies, it is very come that the inheritance of properties or social status and titles are connected and dependent from the mother's lineage of the person.  

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4