Graph each function. (See Examples 1 and 2.)
g(x) = [−x]
Example 1
Graph the greatest−integer function f(x) = [x].
Example 2
In 2013, the U.S. Post Office charged to ship a flat envelope first class to Eastern Europe, Europe, or Australia a fee of $2.05 for up to and including the first ounce, $.85 for each additional ounce or fraction of an ounce up to and including 8 ounces, and then $1.70 for each additional four ounces or less, up to a peak of 64 ounces. Let D (x) represent the cost to send a flat envelope weighing x ounces. Graph D (x) for x in the interval (0, 20].
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