1. Page 82 of your INB Write down this problem on your COMMUNICATOR Be prepared to defend your answer if you are called on. Write down one example of each of the following: -2 variables with a positive association -2 variables with no association Be prepared to share them with your partner & class. Page XX of your INB construct a line of best fit and use it to make predictions.

2. ITEMS of BUSINESS REWORK is due NEXT TIME. Last day to retake Ch 11 test is Thursday April 30. Must have practice test & rework done to retake. Ch 16 test will be on Tues/Wed May 4/5. SAGE Test will be on May 14/15 & 18/19. BE HERE.

3. VOCAB REVIEW Take notes. You can use them on the quiz.

4. DEPENDENT vs. INDEPENDENT Doesn’t matter what goes where. Doesn’t matter what goes where. Dependent goes here.

5. ASSOCIATION vs. NO ASSOCIATION Points seem to go in one direction. Points have NO direction. y = mx + b

6. CLUSTERING vs. OUTLIERS CLUSTERING: Points seem to fall within a defined space. OUTLIERS: Points outside that defined space. They are often disregarded. Sad, but true.

7. POSITIVE vs. NEGATIVE association Both are increasing. “UPHILL” *They AGREE with each other! One increases, the other decreases. “DOWNHILL” *They OPPOSE each other! + + - +

8. LINEAR vs. NON-LINEAR Follows a STRAIGHT line. * Remember, “lines” in math are straight. Does NOT follow a straight line. y = mx + b

9. Have your homework out on your desk.

10. Try this CHALLENGE question: On the scatterplot below, should the point indicated be considered an outlier? Why or why not? Although the outlier if far away from the points, it still follows the direction of the other points.

11. use a line to predict the foot size of a person with a 30cm hand. Get into your Groups LINES Of BEST FIT Pages XX of your INB

12. HOW TO: draw a line of best fit FOLLOW ALONG Do the next 3 slides with the students. Step 1 is to nix any outliers. Step 2 is to draw an oval around the data. Step 3 is to draw a line half-way through the oval, hitting as many points as possible. In the first graph, they will think the bottom left is an outlier, but after drawing the line, alas it is ON the line!! Outliers are FAR AWAY from your line of best fit.

13. Day 1 – Integer operations, PEMDAS, evaluating 16.2 Lines of Best Fit use a line of best fit to predict the foot size of a person with a 17cm hand. 17 25 ≈ 25cm

14. HOW TO: draw a line of best fit FOLLOW ALONG Draw a Line of Best Fit for each graph. Then based on the slope & y-intercept, construct a possible equation of the line.

15. HOW TO: draw a line of best fit FOLLOW ALONG Draw a Line of Best Fit for each graph. Then based on the slope & y-intercept, construct a possible equation of the line.

16. SHOW YOUR WORK Worksheet 16.2 Lines of Best Fit