1. Lesson 7

1.6. Explore 2

Mathematics 30-2 Module 7

Module 7: Exponents and Logarithms

 

So far in this lesson, you have looked at exponential regressions. Next, you will focus on logarithmic regressions.

 
Try This 2

 

This is a photo of a row of weeping willow trees.

iStockphoto/Thinkstock

The Iverson family ordered some trees from the provincial shelterbelt program to plant on their acreage.

 

The following data shows the average growth rate of 20 weeping willow trees after planting. At the time of planting, all the trees were 2 ft in height and were 1 y old.

 

Age of Trees
(Years)		 Average Height (Feet)
1 2
2 4.8
3 6.4
4 9.5
5 13
6 15.2
7 16.6
8 17.8
9 18.5
10 19
11 19.4
12 19.6
  1. Use your graphing calculator to plot the data.
  2. Is the average height increasing or decreasing?
  3. What is the shape of your scatter plot? What kind of model do you expect to use with this data?
  4. What is an appropriate domain and range in this situation?

course folder Save your responses in your course folder.