*  Reading Outline, Sec2.3 *
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* Vocabulary/Definitions *
 - How can we estimate, from a graph, the derivative of a function at a point?
 - Derivative function
 - Implication of f'>0 and f'<0
 - How to estimate derivatives from tabular data (how can this be done
   more accurately?)
 - f'(x) for f(x) = k
 - f'(x) for f(x) = mx + b
 - f'(x) for f(x) = x^n



* Understand *
1. If the graph of a function f(x) passes through the points (0,0),
(0.5,0.354), (1,1), (1.5,1.837), and (2,2.828), estimate the value of
the derivative function f'(x) at these x-values.


2. Using a formula, find the derivatives of the functions f(x) = 3 - 8x
and g(x) = x^{12.8}.