Homework due Wednesday, Nov. 2

pg. 46 # 33, 35, 37

pg. 48 # 1, 2, 3

Linear Regression or "Line of Best Fit"

Homework due Thursday:  pg. 44 # 19, 22, 25 
                                            pg. 46 # 26, 30, 31, 34

Quiz 1.3 on Friday

Line of Best Fit on a TI-Nspire:

To enter data (x and y values)  in to the calculator:

        Start at “Home”, press [new document], save and name it. (starts with page 1.1)

To create a Line of Best Fit:

Step 1:  a) Press [menu] add Lists and Spreadsheets.
              b) At the top of the first column enter a name (you pick the name) for your x-variable
              c) At the top of the second column enter a name (you pick the name) for your y-variable.
              d) Enter the x-values (1 value in a box) under the first column

              e) Enter the y-values (1 vaue in a box) under the second column

Step 3. Press [menu], press [ 4 statistics], press [1 stat calculations], press [3 linear regression mx+b]

Step 4. See the pop-up menu:  

              a)  For X-list: Press [►] until you select the name of your first column then press [tab]

              b)  For Y-list: Press [►] until you select the name of your second column then press [tab]

              c) Press [Enter] or press [OK]

To create a scatter plot:  

Step 1:  a)  Press [CTRL], press [DOC] to add a page to your document.  (page 1.2) 

              b)  Press Data & Statistics, press [enter] 

Step 2:  a) Move curser to bottom center of graph paper and click on the box that appears,

              b) Choose the title you created for x- variables. 

              c) Move curser to left center of graph paper and click on the box that appears,   

              d) Choose the title you created for y-variables. 

To graph the Line of Best Fit on the scatter plot: 

                Press [menu], press [analyze], press [regression], choose Linear Regression (y=mx+b).


Note: Remember "r" is the "correlation coefficient" that ranges between -1 and +1. It tells us how well our data points fit the line. The closer "r" is to -1 or 1 means the closer the data points are to our Line of Best Fit.

Homework due Wednesday 10/26/2016

pg. 44  #11-14, 16,17

Homework due Monday 10/24/16

pg. 42# 1-4, 8, 10

Homework due Tuesday 10/18/2016

pg 38

# 18-20, 23-29, 34, 35

Homework due Monday 10/17/2016

pg. 36 # 1,2,3,6,10,11,12,14,15

Homework 10/12/2016

Ch 1.1 pg. 30

problems: 1,3,4,5,7,9,14,15,18, 23,26,32,33,34