Without seeing the actual graph, I can only provide a general idea based on common representations in physics graphs—especially those that depict motion.
If line labeled "2" represents a scenario where the motion has a constant speed, then the appropriate response from the list could be "walking back toward home at a constant speed."
On the other hand, if this line indicates some form of acceleration or deceleration (such as speeding up to reach top speed), then the corresponding response would depend on the specifics provided by the graph.
To give a definitive answer, I'd need a description of what line 2 specifically looks like in terms of its slope (flat, increasing, decreasing) and any other markers on the graph.