Ies a new conditioner to his hair. He finds that the rate at which his hair
grows can be modeled by a linear function. He observes that the rate of growth is
2 cm every 3 days. After 21 days, he measures the length of his hair to be 24
centimeters. What was the initial length of his hair?

Please help me ASAP!
I need help and please show me all the steps on how you got the answer please.
Thank you!

10cm

Step-by-step explanation: His hair has grown 3cm 7 times over the course of 21 days. This totals 14 in of growth since 21/3*2=14. Then 24-14 gets you 20

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers