2.5 quiz solutions

Section 2.5 Quiz:

Draw graphs to show three different ways in which a function can fail to be continuous.
For the following functions or types of functions, which are guaranteed to be continuous on their domains? (Put a check next to those which are continuous.)
- Polynomials
- Composite functions
- Greatest integer function
- Trig functions

Here are a couple of "solutions" which got full credit:

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