To determine what scenario can be represented by the line labeled 2 in the graph, we need to understand the characteristics of a step-up line. This type of line typically indicates a sudden increase in position (or blocks in this case) over a certain time period, suggesting that the movement is happening at a constant speed during that step.
Among the options provided:
-
Speeding up to reach top speed: This scenario would likely show a curve (acceleration) rather than a straight line, as the speed is changing over time.
-
Stopping for an animal to cross the road: This would represent a flat line (no movement) as the object would be stationary while waiting.
-
An object falling from a tall building: This would also typically show a curve (acceleration due to gravity), as the object’s speed increases as it falls.
-
Walking back toward home at a constant speed: This scenario fits well with a step-up line, as it indicates consistent movement over time.
Based on this reasoning, the scenario that can be represented by the line labeled 2 is:
Walking back toward home at a constant speed.