SOLUTION: you plant a tree at the start, it is 3 feet tall. after 4 years,it is 8 feet tall. assuming linear growth, predict its height after 15 years.

Question 1164788: you plant a tree at the start, it is 3 feet tall. after 4 years,it is 8 feet tall. assuming linear growth, predict its height after 15 years.

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
let x= years and y=height. x is the independent variable and can be controlled, and y is dependent and depends on x. This is standard throughout math and statistics.
ordered pairs (0, 3) and (4, 8)
point slope formula y-y1=m (x-x1) m slope (x1, y1) point
slope is 5/4
y-3=(5/4)(x)
y=(5/4)x+3
so after 15 years y=(5/4)*15+3
=21.75 feet.

RELATED QUESTIONS
Roger buys and plants a tree sapling measured at 3 feet tall. After 1 year of growth,... (answered by richwmiller)

Part A: A�tree is planted on a farm. The tree was 5 feet tall when it was planted. �The... (answered by solver91311)

A bamboo plant is growing 1 foot per day. When you first measure it, it is 4 feet tall.... (answered by stanbon)

A tree is 5 feet tall and grows at a rate of 6 feet a year.Write an Equation that relates (answered by josmiceli)

If a tree is 6 feet tall and grows 2 feet a year, what is the expression for the growth... (answered by Mathtut)

When the Jenkins family moved into their home 10 years ago, there were two small trees in (answered by josgarithmetic)

Problem: When the Jenkins family moved into their home 10 years ago, there were two small (answered by ankor@dixie-net.com)

A Norfolk pine is 3feet tall and grows at a rate of 1.5 feet per year. How old is the... (answered by Boreal,ikleyn)

A tree is 67 inches tall. How tall is it in feet and... (answered by Alan3354)