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Question

A graph shows an x-axis representing time in seconds ranging from 0 to 12 in increments of 2. The y-axis represents heartbeats ranging from 0 to 18 in increments of 3. The graph shows a line representing resting heart rate.



What is the average number of heartbeats per second?

(1 point)
Responses

2 beats per second
2 beats per second

23 beat per second
Start Fraction 2 over 3 End Fraction beat per second

3 beats per second
3 beats per second

112 beats per second
1 Start Fraction 1 over 2 End Fraction beats per second
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Answer 1

To determine the average number of heartbeats per second from the graph description, we need to know the total number of heartbeats and the total time.

Assuming that the graph shows the heart rate steadily across the time range (from 0 to 12 seconds), we can calculate the average heartbeats per second.

Let's use the maximum value available on the y-axis, which is 18 beats (as inferred from the increments on the y-axis).

If we assume that over the entire 12 seconds, the heart rate stays at the maximum heart rate of 18 beats consistently (as specific values aren't provided in the question), the total number of heartbeats would be:

$$\text{Total Heartbeats}=\text{Heart Rate}\times \text{Time}=18\text{ beats/min}\times 12\text{ seconds}$$

Now converting heart rate to per second: The heart rate measurement would be more commonly mentioned in terms of beats per minute. Therefore:

$$18\text{ beats/min}=\frac{18\text{ beats}}{60\text{ seconds}}=0.3\text{ beats/second}$$

If we want to consider a resting state where typical heart rates fall within the range of 60 - 100 beats per minute, the average can contribute:

So for the sake of simplicity, let's say we are taking an average of 12 (to balance the maximum heart rate indicated) hence at a rate considers a constant range:

From provided answers looking back at the closest calculations and edges, for example if we consider a resting heart rate average at the max point scaling down across time 'T':

Thus for a period of 12s sustained at that average interpreting:

• If determined at 24 heart beats per minute (the closest derivative might offer 1 to 2 range as averages are considered) hence: We can derive: So to finalize alignment:

We want the average over that span: 12 seconds would yield: $$\text{Average}=\frac{TotalHeartbeats}{TotalTime}=\text{Around 12 total implies around 2 best selections possible counting}$$

So the correct response would be: 2 beats per second.