Using the function concept, it is found that one is represented by the fourth graph.
When is a function defined?
- In a function, one value of the input can be related to only one value of the output.
- In a graph, it means that each value of x can be mapped to only one value of y, that is, there are no vertically aligned points.
In this problem, the first three graphs have vertically aligned points, that is, values of x mapped to more than one value of y, hence they are not functions.
The last graph has no vertically aligned points, that is, each value of x is mapped to only one value of y, hence it is a function.
More can be learned about the function concept at https://brainly.com/question/12463448
