To find:
Determine whether the relation is a function and find domain and range.
Solution:
A relation can be identified as a function if each element in domain has only one image in the range of the function.
The first function is shown by a graph. Here, each x-value has a different y-value. So, the given relation is a function.
The domain of the first function is
[tex](-\infty,\infty)[/tex]
The range of the first function is
[tex](-\infty,\infty)[/tex]
In the second function, -2 has two images that are (0, 3). So, it is not a function.
The domain is (-4, -2, 1, 2) and the range is (-1, 0, 2, 3).
