Question

The graph, that, best represents a participant in a triathlon, under given conditions.

Short answer

Graph B best represents a participant in a triathlon.

Step-by-step solution

Step 1. Given Graphs.

In triathlon, athletes swim 2.4 miles, bicycle 112 miles, and run 26 miles. Their total time includes transition time from one activity to the next. Also given three below graphs that represent the participant:

Step 2. Explanation.

As there are given three events, there will be two transition times from one activity to another activity, so the most suitable graph, representing this situation will have two line segments, parallel to the x-axis, representing no change in distance covered as the time increases.

Step 3. Conclusion.

As based on the above fact, graph B best represents the given situation, showing two line segments parallel to the x-axis for a short duration of time.