Thread:HMcCoy/@comment-28838092-20140825225626/@comment-24808864-20140825235713

On the first problem (3a:) the problem is asking for the domain and the range of a set of ordered pairs. Remember, from graphing, that the x-coordinate is the first coordinate and the y-coordinate. Therefore the domain (which is the set of all inputs) would be the set of all the x-coordinates. In this case, the domain would be $$ \{-1,-2,-3\} $$ which is the set of just the x-coordinates.

Since the y-coordinates are the outputs, can you describe the range for me? Remember, it is the set of all possible outputs. (Hint: In this case, the range will contain more numbers than the domain AND all of the numbers in the range are larger than the numbers in the domain)

BTW: To determine whether the relation is a function, try sketching it, and then you can use the vertical line test.