Aquantity, y, varies directly as x. when y = 9, x = 4. find y when x = 10.
22.5
3.6
4.4
15

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

59/96 is the ratio hope this not 100% sure though : /