Domain and Range

[ludmela5]

What is meant by a reasonable domain and range?

[droliprosty10]

In this demo, animations and slider-driven applications help students to make connections between the points on a graph of a function and the domain and range of the function.  A typical type of textbook problem (see 4-5 in the references) is to consider a graph and to use the graph to determine the domain and range of a function.   We consider several examples in order of increasing difficulty.