From the graph, the likely resting heart rate for a student who exercises about 3 hours a week would be 69 bpm.
What is resting heart rate?
It is the normal rate at which the heart pumps blood when in resting conditions.
From the graph, the resting heart rate is inversely proportional to the number of hours spent exercising per week.
For someone that exercises 3 hours per week, the resting heart rate hovers between 70 and 65 bpm.
Thus, the likely resting heart rate from the available option would be 69 bpm.
More on resting heart rate can be found here: https://brainly.com/question/1155838