Answer:
f(x) or y=6+2x
Step-by-step explanation:
X is equal to the number of months and y is equal to the length of the hair in centimeters. Since 6 is the initial amount you use it as the b/y-intercept in slope-intercept form (y=mx+b). M is the slope and in this case it would be 2 because that how long it grows each month.