Answer:
D.

Explanation:
Let D represent David's hair growth and J represent Jarrett's hair growth.
We have been given that David's hair grows at a rate four times as fast as Jarrett's. We are asked to find the algebraic equation that best represents Jarrett's hair growth rate.
We can represent our given information in an equation as:

Dividing both sides by 4 we will get,



Therefore, the equation
best represents Jarrett's hair growth rate and option D is the correct choice.