To find the average number of heartbeats per second, we need to determine the total number of heartbeats over the given time and then divide it by the total time.
From your description, the y-axis represents heartbeats ranging from 0 to 18, which likely indicates the total heartbeats at different times. The x-axis ranges from 0 to 12 seconds.
If the resting heart rate line shows a consistent pattern (e.g. it could be a constant heart rate), we need to find out how many heartbeats occur in the 12 seconds.
For example:
- If the maximum value on the y-axis is 18 heartbeats at 12 seconds, then we can calculate the average heart rate as follows:
Total heartbeats over 12 seconds = 18
Total time = 12 seconds
Average heartbeats per second = Total heartbeats / Total time
= 18 beats / 12 seconds
= 1.5 beats per second
However, if there is a specific value on the graph that indicates the resting heart rate (e.g., it consistently reaches 12 heartbeats over the 12 seconds), you would do:
Total heartbeats over 12 seconds = 12
Total time = 12 seconds
Average heartbeats per second = Total heartbeats / Total time
= 12 beats / 12 seconds
= 1 beat per second
Without seeing the actual graph, it's difficult to provide an exact answer. Based on the options you listed, it seems like the values you calculated may be rounded or based on a specific graphical representation.
To match with the responses you provided, if there is one close to our calculation based on the provided ranges, that would be the most suitable answer.
However, a heartbeat tracking method or specific numeric data on the graph would provide better precision in determining the average heartbeats per second.
If you can specify or provide the value of heartbeats shown on the graph per time increment, I could assist you in finalizing the exact answer. Based on common resting heart rates seen in humans, a well-rounded and possible guess without specific graphical data might be 2 beats per second if averaging out from a total closer to 24 heartbeats over 12 seconds.