Respuesta :
The function is set of ordered pairs in which each X element has only a Y element.
- The vertical line test is used to determine the function exists or not. If the vertical line is moved across the graph one point of the graph is a function. The line moving from point to point is a function.
Hence the option A is correct.
Learn more about the following does NOT represent a way to determine if something.
brainly.com/question/18679773.