End of 12

Ch. 12 #8, 9, 18, 19, 22

just a bit

Find a price from your parents and figure out the inflation rate
Finish #4: graph and algebra
On the ball lab: are the graphs continuous or discrete? what are the
y-intercepts?

methods

Ch. 12 #11, 12, 14

survey says...

Ch. 12 #5-8
Read P. 241-242

Unit 2 Review

Ch. 10 #27
Unit II Review #1, 2, 4, 8, 9, 37, 40
Due Wednesday!
Article Due Friday!!

more transformations

worksheet

transformers!

Ch. 10 #1, 2, 7

Influential

Ch. 9 #11, 12, 13

end of chapter 8

HW:  Ch. 8 #31, 32, 36

Notes from today in class:

• What the heck is a "line of best fit"?
  
• Its real name is: Least Squares Regression Line!
  
• Or:  LSRL
  
• Least squares? least squares of what?
  
• The sum of all the residuals squared is as small as possible!
  
• Regression?  What does that word mean?
  
• r tells us how much to regress to the mean (example…)
  
• And speaking of mean:
  
• (x-bar, y-bar) is on the line (duh!).
  
• And btw:  the residuals always add up to zero.
• You should also note that if you switch x and y, the correlation does not change, but the LSRL does.
• You should never use a LSRL to predict x using y.  It is not created to minimize the predictions for x, only for y.

R^2

Ch. 8 #3bcd and #21

residuals

Ch 8 # 9c, 10de, 35d
Thanks!

slope, y-int

Ch. 8 #9ab, 10abc, 35abc