Prices of crude oil have been steadily rising over the last two years (The Wall Street Journal, December 14, 2010) . The monthly data on price per gallon of unleaded regular gasoline in the United States from January 2009 to December 2010 were available. Three trend models were created starting with t = 1 and the following output was generated. 
Which of the following would be a difference in the forecasts for the price of regular unleaded gasoline for February 2011 comparing two trend models: cubic and quadratic?
Definitions:
Marriage
A culturally sanctioned union between two or more people that establishes certain rights and obligations between the people, between them and their children, and between them and their in-laws. Such marriage rights and obligations most often include, but are not limited to, sex, labor, property, child rearing, exchange, and status.
Sharia Law
A religious legal system governing the members of the Islamic faith.
Sexual Relations
Interactions of a sexual nature between individuals, encompassing a range of behaviors and relationships.
Outside Marriage
Relationships or sexual activities that occur outside the bounds of a legally or culturally recognized marriage.
Q9: Refer to the portion of regression results
Q25: A quadratic regression model is a polynomial
Q31: Which of the following predictions cannot be
Q56: Which of the following is NOT a
Q60: Noncausal forecasting models are purely time series
Q77: To extract the trend from a time
Q84: The restricted model is a reduced model
Q92: In regression, the two types of interval
Q96: The following scatterplot shows productivity and number
Q114: An option can be exercised only by