Two contour maps are shown. One is for a function f whose graph is a cone. The other is for a function g whose graph is a paraboloid. Which is the contour map of a cone? 
Definitions:
Tie-in Marketing
A sales strategy where one product is sold or marketed only in combination with another product.
Coca-Cola
A multinational beverage corporation best known for its flagship carbonated soft drink, Coca-Cola.
Six Flags
A chain of amusement parks and theme parks in North America known for its thrilling rides and entertainment.
Robinson-Patman Act
U.S. legislation aimed at preventing anticompetitive practices by producers, specifically price discrimination.
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