Answer:
f = 5/6 = 0.833 or f = 0
Step-by-step explanation:
I met a man with 7 wives....each wife had 7 sacks (7*7) = 49 sacks.
each sack had 7 cats...(49 * 7) = 343 cats
each cat had 7 kittens...(343 * 7) = 2401 kittens <==
D) because a straight line has an infinite solution