A transit company operates commuter trains to help people get to the city each day. Each train travels on a straight route to an
d from the farthest station, stopping at other stations along the route. The graph shows the distance y miles the train is from the station after x minutes.
Do you mean an extraneous solution? I will tell you what I think. To tell if a solution is extraneous you need to go back to the original problem and check if there actually is a solution or if the solution is actually right. If not then it is extraneous.
