(See attached file for full problem description)
The function that describes first-class mail postage has discontinuities. The cost of first-class mail is 37¢ for the first ounce (or less) and then 23¢ for each additional ounce above that. Make a graph showing the total cost of postage for packages up to 4 ounces.
This solution is comprised of a detailed explanation to construct a graph.