A. School 1 has the highest median because 5 is greater than 3 and 1 B. School 1 has the smallest range because 10 - 5 = 5
C. School 3 has the greatest range because 7 - 4 = 3.
D. School 2 has the smallest IQR because 7.5 - 6 = 1.5.

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

With a continuous thought process.