1. Graphing and Interpreting Scatter Plots Objective - To graph and interpret scatter plots.

2. Scatter Plot A scatter plot is a graph of a collection of ordered pairs (x,y). X –independent/horizontal axis Y- dependent/vertical axis The graph looks like a bunch of dots, but some of the graphs are a general shape or move in a general direction.

3. Positive Correlation Review X-coordinates and the y- coordinates both increase, then it is POSITIVE CORRELATION.

4. Real Life Positive Correlation If you look at the age of a child and the child’s height, you will find that as the child gets older, the child gets taller. Because both are going up, it is positive correlation. Age12345678 Height 25 31 343640414755 Justification 1.Trend is increasing. 2.Correlation: Positive 3.When the age increase the height

5. Negative Correlation X-coordinates and the Y- coordinates have one increasing and one decreasing, then it is NEGATIVE CORRELATION.

6. Real Life Negative Correlation If you look at the age of your family’s car and its value, you will find as the car gets older, the car is worth less. This is negative correlation. Age of car 12345 Value$30,000$27,000$23,500$18,700$15,350 Justification 1.Trend is decreasing. 2.Correlation: negative 3.When the age of car increase the value decreases

7. No Correlation no pattern scattered This means the two are not related.

8. No Correlation Size shoe a baseball player wears and their batting average Not related because the shoe size does not make the player better or worse, then are not related.

9. Interpreting Scatter Plots

10. Linear trend or not a trend a) c)e) b) d)f) Negative Correlation Positive Correlation Constant Correlation

11. Year Sport Utility Vehicles (SUVs) Sales in U.S. Sales (in Millions) 1991 1992 1993 1994 1995 0.9 1.1 1.4 1.6 1.7 x y Year Vehicle Sales (Millions) 5432154321 Justification 1.Trend is ____________ 2.Correlation: 3. I DO: Model and Guided Practice

12. We Do: Guided Practice 1. Use the given information to make a scatter plot. Make sure to include Name for Graph, label each axes, and have appropriate intervals. Insert Lesson Title Here Grading Period1234 Number of A’s56810 Justification 1.Trend is _____________. 2.Correlation:______________ 3.

13. Partner Activity: Plot the data on the graph such that homework time is on the y-axis and TV time is on the x-axis. Student Time Spent Watching TV Time Spent on Homework Sam Jon Lara Darren Megan Pia Crystal 30 min. 45 min. 120 min. 240 min. 90 min. 150 min. 180 min. 150 min. 90 min. 30 min. 90 min.

14. Plot the data on the graph such that homework time is on the y-axis and TV time is on the x-axis. TVHomework 30 min. 45 min. 120 min. 240 min. 90 min. 150 min. 180 min. 150 min. 90 min. 30 min. 120 min. 90 min. Time Watching TV Time on Homework 30 90 150 210 60 120 180 240 240 210 180 150 120 90 60 30

15. Describe the relationship between time spent on homework and time spent watching TV. Time Watching TV Time on Homework 30 90 150 210 60 120 180 240 240 210 180 150 120 90 60 30 Trend is decreasing. Trend appears linear. Negative correlation.

16. You Do Independent Work

17. Closure Fist of 5 Wrap Up