Question

Question

Use the image to answer the 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

3 beats per second
3 beats per second

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

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

2 beats per second

Answer 1

To determine the average number of heartbeats per second, we need to look at the total number of heartbeats over a given time period.

According to the information you provided, the graph shows heartbeats ranging from 0 to 18. Let's assume that the resting heart rate shows a total of 18 heartbeats over a time period of 12 seconds.

To find the average number of heartbeats per second, we can use the formula:

\[ \text{Average heartbeats per second} = \frac{\text{Total heartbeats}}{\text{Total time in seconds}} \]

Substituting the values:

\[ \text{Average heartbeats per second} = \frac{18 \text{ heartbeats}}{12 \text{ seconds}} = 1.5 \text{ beats per second} \]

1.5 beats per second is equivalent to \(1 \frac{1}{2}\) beats per second.

Therefore, the correct response is:

1 1/2 beats per second.