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
1 1/2 beats per second
2 beats per second
2/3 beat per second
To find the average number of heartbeats per second, we can use the following formula:
Average number of heartbeats per second = Total number of heartbeats / Total time in seconds
From the graph, we can see that the resting heart rate line is constant at 3 heartbeats for each 2-second interval. Therefore, in each 2 seconds, there are 3 heartbeats.
The total time in seconds is given as 12 seconds.
Using the formula: Average number of heartbeats per second = 3 heartbeats / 12 seconds = 1/4 beats per second.
So the average number of heartbeats per second is 1/4 beats per second.
To find the average number of heartbeats per second, we need to calculate the total number of heartbeats over the given time period and then divide it by the total time in seconds.
From the graph, we can see that the resting heart rate is approximately 9 heartbeats over 12 seconds.
Therefore, the average number of heartbeats per second would be:
Total number of heartbeats / Total time in seconds
= 9 heartbeats / 12 seconds
= 3/4 beats per second
So, the correct answer is 3/4 beat per second.
To answer this question, we need to determine the average number of heartbeats per second based on the given graph.
First, we need to find the total number of heartbeats during the given time period. From the graph, we can see the resting heart rate line and calculate the area under the curve.
To find the total number of heartbeats, we can calculate the area of the rectangle underneath each interval on the graph and sum them up.
The x-axis represents time in seconds, and the y-axis represents heartbeats. The area of each rectangle can be found by multiplying the width of the rectangle (representing the time interval) by the height of the rectangle (representing the number of heartbeats).
Since the x-axis increments in 2-second intervals and the y-axis increments in 3 heartbeats, each rectangle has a width of 2 seconds and a height of 3 heartbeats.
Let's calculate the total number of heartbeats:
Interval 1: Rectangle area = 2 seconds * 3 heartbeats/second = 6 heartbeats
Interval 2: Rectangle area = 2 seconds * 3 heartbeats/second = 6 heartbeats
Interval 3: Rectangle area = 2 seconds * 3 heartbeats/second = 6 heartbeats
Interval 4: Rectangle area = 2 seconds * 3 heartbeats/second = 6 heartbeats
Interval 5: Rectangle area = 2 seconds * 3 heartbeats/second = 6 heartbeats
Interval 6: Rectangle area = 2 seconds * 3 heartbeats/second = 6 heartbeats
Total number of heartbeats = 6 + 6 + 6 + 6 + 6 + 6 = 36 heartbeats
Next, we need to calculate the total time in seconds. Since the graph spans from 0 to 12 seconds in increments of 2, we have a total of 6 intervals, each with a duration of 2 seconds.
Total time in seconds = 6 intervals * 2 seconds/interval = 12 seconds
Finally, we can calculate the average number of heartbeats per second by dividing the total number of heartbeats by the total time in seconds.
Average number of heartbeats per second = Total number of heartbeats / Total time in seconds
= 36 heartbeats / 12 seconds
= 3 heartbeats per second
Therefore, the average number of heartbeats per second is 3 beats per second.