Situation: The Ipod Touch has been out for two years now and a lot of data has been collected. Relevant Relationship: There is a functional relationship between Price of an IPod Touch, and Weekly Demand,. Below is a table of data that have been collected

Price,,($)	Weekly Demand,,(1,000s)
150	211
170	199
190	199
210	186
230	178
250	168

A.. Find the linear model that best fits this data using regression and enter the model below (for entry round the linear parameter value to nearest 0.01 and constant parameter to nearest 1) B. The squared correlation coefficient was Select an answer below above 0.95 (note: values less than 0.95 MAY mean the model is not appropriate for making predictions) Now answer these two questions using the UNROUNDED model parameters C. What does the model predict will be the weekly demand if the price of an ipod touch is $168 ? (nearest 100) D. According to the model at what should the price be set in order to have a weekly demand of 207,600 ipod Touches? $ (nearest $1) Note: In the "real" world Apple sold about 20 million Ipod Touch's from Sept. 2007-Sept. 2009 Answer

Here is data with as the response variable.

x	y
71.4	40.5
77.2	66.7
73.2	33.7
74.1	23.4
74.2	40.5
145.1	126.8
57.8	-14.6
76.7	33.5
76.8	8.6
59.8	46

1. Make a scatter plot of this data. Which point is an outlier? Enter as an ordered pair, e.g., (x,y).
2. Find the regression equation for the data set withoutthe outlier.Enter the equation of the form mx+b rounded to three decimal places. Ywo=
3. Find the regression equation for the data set withthe outlier. Enter the equation of the form mx+b rounded to three decimal places. Yw=
4. Is this outlier an influential point?
   • Yes, the outlier appears to be an influential point.
   • No, the outlier does not appear to be an influential point.