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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

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

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

2 beats per second
2 beats per second

3 beats per second
3 beats per second
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Answer 1

To find the average number of heartbeats per second from the graph, we need to determine the total number of beats and the total time in seconds.

Assuming the resting heart rate represented on the graph reaches a maximum of 18 beats when the time is 12 seconds:

• If the heart rate is constant at 18 beats for 12 seconds, we can calculate the average number of heartbeats per second.

Total beats = 18 beats Total time = 12 seconds

Average heartbeats per second = Total beats / Total time = 18 beats / 12 seconds = 1.5 beats per second.

However, none of the provided options state 1.5 beats per second. But if we look for the closest approximation available among the choices, the appropriate match is:

1 \( \frac{1}{2} \) beats per second

Please note that this option corresponds to the fraction form of 1.5.

So the answer would be:

1 \( \frac{1}{2} \) beats per second