Which of these relations is a function?

To determine which relations are functions, we need to use the Vertical Line Test. This test states that if a vertical line intersects a graph more than once, then the relation is not a function.

1. Top left graph: If a vertical line intersects it more than once, it’s not a function.
2. Top right graph: If any vertical line intersects it only once, then it’s a function.
3. Bottom left graph: Similar to the above, check for intersections.
4. Bottom right graph: Again, check intersection points.

Without the graphs, I can’t specify which is a function. However, follow the Vertical Line Test to identify the correct answer based on how many times a vertical line hits each graph. Good luck! If you need more detailed assistance, feel free to check the extended services page!