Graph each of the following equations. (Keep the graphs handy, because you will need them later.)  

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 $y = \left|x\right|$: all real numbers
   Range of $y = \left|x\right|: y ≥ 0$

   Domain of$\left|y\right| = x: x ≥ 0$
   Range of $\left|y\right| = x$: all real numbers