Verified Answer :

f(x) = 6x - 4.  finding f(x)/-4        x = 8

f(8) = 6*8 - 4 = 48 - 4 = 44

f(8) / -4   =  44/-4 = -11.

Option B.

f(x)=6x-4
f(8)=6*8-4
f(8)=48-4
f(8)=44

f(8)/-4=44/-4=-11