In Chapter 8, Exercise 9, we created a linear model describing the trend in the number of passengers departing from the Oakland (CA) airport each month since the start of 1997. Here's the residual plot, but with lines added to show the order of the values in time:

a) Can you account for the pattern shown here?
b) Would a re-expression help us deal with this pattern? Explain.

Transcribed Image Text:

2e+05 2e+05 De+00 2e+05 10 15 Years since 1990 20 25