The article ?$115K! The 13 Best Paying U.S. Companies? (USA TODAY, August 11, 2015) gave the following data on median worker pay (in thousands of dollars) and the 1-year percent change in stock price for the 13 highest paying companies in the United States. A scatterplot of these data is also shown.

The equation of the least-squares line with y = Percent change in stock price and x 5 Median worker pay is y = 2358 + 3.14x.

a. The observations for Jupiter Networks and Netflix are both far removed from the other points in the scatterplot in the x direction. Which of these observations would have the greatest impact on the equation of the least-squares line if it were to be omitted from the data set?

b. Explain the difference between an influential observation and an outlier in a bivariate data set.

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Percent Change in Stock Price Median Company Worker Pay Jupiter Networks 134.7 21.7 Netflix 132.2 92.2 Equinix 125.0 33.9 Altera 122.8 52.2 Visa 122.5 41.9 Yahoo 121.2 2.8 Xilinx 121.2 5.2 VeriSign 119.0 30.1 Microsoft 118.0 8.0 Broadcom 118.0 37.3 F5 Networks 117.6 15.9 Adobe Systems 117.4 22.0 eBay 115.1 -44.7 100 75 50 25 -25 -50 130 Median worker pay 115 120 125 135 Percent change in stock price