Question

A certain species of tree grows an average of 3.1 cm per week. Write an equation for the sequence that represents the weekly height of this tree in centimeters if the measurements begin when the tree is 400 centimeters tall.

Answer 1

h(t) = 3.1*t + 400

h(t) is the height of the tree at t weeks

t = the number of weeks

3.1*t because the tree grows 3.1 cm per week.
you have to add 400 cm, because suppose you have t= 0, then h(0) = 400 which is the initial height of the tree.