To find the average number of heartbeats per second, we need to determine the total number of heartbeats divided by the total time.
From the graph, we can see that the resting heart rate ranges from 6 to 18 heartbeats, which is a difference of 12 heartbeats. The time range is from 0 to 12 seconds, which is a difference of 12 seconds.
Therefore, the average number of heartbeats per second is 12 heartbeats divided by 12 seconds, or 1 beat per second.
So, the correct answer is C) 1 1/2 beat per second.
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. The line passes through the following plotted points: left parenthesis 4 comma 6 right parenthesis; left parenthesis 6 comma 9 right parenthesis; left parenthesis 10 comma 15 right parenthesis; and left parenthesis 12 comma 18 right parenthesis.
What is the average number of heartbeats per second?
A 2 beats per second
B 2/3 beat per second
C 1 1/2 beat per second
D 3 beat per second
1 answer