What two types of functions did the previous units examine, and what are their general forms?, Why do economists consider linear and quadratic functions sufficient for modeling many relationships?, What is the definitional term in a cubic function, and why is it called "definitional"?, In the simple cubic function y=x3 , what happens to the value of y when x is a fraction between 0 and 1?, How does the graph of y=−x3 differ from the graph of y=x3 ?, Why is the graphical method of solving cubic equations considered unsatisfactory?, What do mathematicians call the alternative methods used to solve cubic equations, and how are these calculations performed today?, What is the simplest form of a rectangular hyperbola given in the text?, List three key features of the graph of  y=1/x., According to the text, why are the circle and the ellipse worth studying in economics?.

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