Algebra 1 Online! Henrico County Public Schools, Virginia
Module - Data Analysis
Lesson 4 - Best Fit Lines and Curves
 Lessons 1- Adding, Subtracting, and Scalar Multiplication of Matrices 2- Measures of Central Tendency 3- Box and Whisker Plots 4- Best Fit Lines and Curves 5- Deviation and Z-Scores 6- Module Review
SOL

A.11 - The student will collect and analyze data, determine the equation of the curve of best fit in order to make predictions, and solve real-world problems, using linear and quadratic models.

Common Core Standards
 8.SP.3 F-LE.1a F-LE.2 S-ID.6a S-ID.6b S-ID.6c S-ID.7 S-ID.8
Warm-up
Lessons
1. Notes: Finding Median Line of Best Fit (pdf)
2. Activity: Project Graduation Line of Best Fit (doc) | (pdf)
3. Notes: TI83 Best Fit Models (pdf) *New 2009 SOL Content*
4. Notes: TI83 Curve Fitting with Residuals (pdf) *New 2009 SOL Content*
Videos
Explore Learning
1. Determining a Spring Constant: Place a pan on the end of a hanging spring. Measure how much the spring stretches when various masses are added to the pan. Create a graph of displacement vs. mass to determine the spring constant of the spring.
2. Estimating Population Size: Adjust the number of fish in a lake to be tagged and the number of fish to be recaptured. Use the number of tagged fish in the catch to estimate the number of fish in the lake.
Geogebra

Internet Sites
1. Interactive: Linear Regression Applet - plot up to 50 points and predict the line of best fit
2. Interactive Notes: Line of Best Fit - lessons and practice problems at Regentsprep.org
3. Notes: Using the TI Calculator to Find the Quadratic Function *New 2009 SOL Content*

Homework
1. Casio Calculator Investigation (pdf)
2. Line of Best Fit Worksheet (doc) | (pdf)
3. Linear Equation Experiments (doc) | (pdf)
4. Glencoe PWS (pdf)
5. Glencoe SG (pdf)
Journal
1. Correlation: What situations in your own life would present a negative correlation?
Study Guide
Other
 HCPS 2002-