how to use the vertical line test to determine whether the relation of a graph is a function
To use the vertical line test to determine whether the relation of a graph is a function, follow these steps:
1. Take a look at the graph and identify any vertical lines that you can draw.
2. Imagine or visually draw all possible vertical lines passing through the graph.
3. Observe if any of these vertical lines cross the graph more than once.
4. If a vertical line intersects the graph at only one point at any given position, then the relation is a function.
5. However, if there exists a vertical line that crosses the graph at two or more points, the relation is not a function.
In summary, if no vertical line crosses the graph in more than one point, then the relation represented by the graph is a function.