Answer:
4th graph is not a function
Step-by-step explanation:
A function is a relation in which no two ordered pairs have the same input (or x-values) and different outputs (y-values).
Remember that a function can only take on one output for each input.
The Vertical Line Test allows us to know whether or not a graph is actually a function. If a vertical line intersects the graph in all places at exactly one point, then the relation is a function.
Attached is a screenshot where it shows why the last graph is not a function. I didn't have to do the VLT on all of the graphs because I could easily see that the other graphs are functions. The last graph shows a yellow line that has two points in it. Therefore, the last graph is not a function.
Please mark my answers as the brainliest, if you find this helpful :)
