Graphs That Are Not Functions. If any vertical line intersects a graph more than once the relation represented by the graph is not a function. This function is at about three and a half at five seconds.
Figure pageindex 1 shows a graph that represents a polynomial function and a graph that represents a function that is not a polynomial. If any vertical line intersects a graph more than once the relation represented by the graph is not a function. The vertical line test a graph or set of points in the plane is a function if no vertical line contains more than one of its points.
The intercept of the graph is at 0 0.
Or maybe it could point to e or whatever else. The intercept of the graph is at 0 0. This would not be a function. Notice that any vertical line would pass through only one point of the two graphs shown in parts a and b of the graph above.
