6.3: Finding a Line of Best Fit Created by: CK-12 CK-12 Texas Instruments Algebra I Student Edition SE Writing Linear Equations Edit Review Was this helpful? Submit Review Skip Review Cancel Read Resources Details This activity is also intended to supplement Algebra I, Chapter 5, Lesson 5. In this activity, you will explore: Creating a scatter plot representing resting heart rates versus age. Graphing vertical and horizontal lines to show and for both the ages and the heart rates. Using the vertices of the and lines to calculate a line of best fit and graph it. Problem 1 - Entering the Data Enter the 21 data points shown in the screens below in the AGE and RHR lists. Plot this data as a scatter plot. Problem 2 - Answer the Questions What are and of the ages? Graphs these as horizontal lines. What are and of the heart rates? Graph these as vertical lines. Where do these lines intersect? Write the coordinates of the four points. Identify the diagonal across the center rectangle that follows the direction of the points. What two intersection points does it connect? Use these two points to write the equation for the line that will form the diagonal using the point-slope form. Problem 3 - Graph the Equation Using the information from Problem 2, graph the equation of the line. Image Attributions Description No description available here... Tags: CabriJr application data perpendicular slopes (2 more) scatter plot TI.MAT.ENG.SE.1.Algebra-I.6 Categories: mathematics Grades: 9 , 10 Date Created: Feb 22, 2012 Last Modified: Aug 19, 2014 Files can only be attached to the latest version of None