1. Algebra 3 Lesson 1.9 Objective: SSBAT identify positive, negative or no correlation. SSBAT calculate the line of best fit using a graphing calculator. Standards: M11.E.4.2.1; M11.E.4.2.2

2. Scatter Plot  A graph in which 2 sets of data are plotted as ordered pairs on a coordinate grid When the 2 sets of data have a pattern they are said to be correlated.

3. Positive Correlation  The y-value increases as the x-value increases  The graph will go in an uphill motion from left to right

4. Negative Correlation  As the x-value increases the y-value decreases  The graph will go in a down hill motion from left to right

5. No Correlation  There is no relationship between the x and y values  The points on the graph are just scattered

6. Complete Worksheet: 1.9 Scatterplots A

7. Line of Best Fit or Regression Line  Can be drawn when a scatterplot shows a positive or negative correlation  A straight line that best represents the data in a scatterplot

8. http://hotmath.com/hotmath_help/top ics/line-of-best-fit/lineofbestfit-h-2.gif http://crctlessons.com/ima ges/line-of-best-fit.jpg Examples of a Best Fit Line

9. Complete Worksheet: 1.9 Scatterplots B

10. Day 2 Linear Regression Calculator

11. Complete Worksheet 1.9