Examine the graph of the relation at right.  

1. Use inequalities to name its domain and range.

   Hint 1(a):

   What are all the possible values of $x$, or the domain of the function?

   Hint 2(a):

   What are all the possible values of $y$, or the range of the function?

   Answer (a):

   D: $x ≤ 2$
   R: $y ≤ 4$

2. Is this relation a function? How can you tell?

   Hint (b):

   Does each value of $x$ have only one $y$-value?