Graph each of the following equations. (Keep the graphs handy, because you will need them for your homework for Lesson 4.1.4.).

3. How are the two graphs similar? How are they different?

   Hint (c):

   Look at the shape and orientation of each graph.

4. What are the domain and range of each relation?

   Answer (d):

   Domain of $y=|x|:$ all real numbers
   Range of $y=|x|:y\ge0$

   Domain of $|y|=x:x\ge0$
   Range of $|y|=x:$ all real numbers