Just look at the image, and as well explain how you got it.

The answer to your question is: the third graph

Step-by-step explanation:

To test if a relation is a function you need to draw a vertical line in different areas of the graph (vertical line test), if this line cuts the curve in two  or more points, it is not a function.

After doing this test in the graphs, we notice that in graphs 1 and 2 the vertical line cuts the graph in two points so the are not functions.

The forth graph is a vertical line.

Only the third graph is cut in one point.

See the test in the attachment.

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation: