let us consider following three picture grouped as in one picture
suppose that we have following problem: during the $1$ hour,biker was moving around station $A$ and during this $1$,he did not go further then $10KM$ from station A ,question is: from given three graph,which one could be graph ,which describes distance passed by biker as depend on parameter time $t$
clearly second one(სურათი ||,სურათი(georgian) means picture,კმ-km(distance )) describes because during $1$ hour,biker has not moved more then $10$ km from station $A$,but what about first and third one?this problem we can represent as a biker moving way as a circle with center on origin of coordinate axes and radius $10$,answer says that second and third one can be graph which describes movement of biker,but i am surprise,because at $1$ he reached more then $10$ from $A$,while first picture we should determine where sum of length of triangles is more then $10$,but on the other hand,one picture first,he has not gone more then $10$ point on $S$ axis,please help me