Plz, answer the question in the photo.

I'm pretty sure it's b). i try drawing the functions out and b is the one that stands out or isnt a "line"

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8