(4,6) (6,9) (10,15) (12, 18)
What is the average number of heartbeats per second?
To find the average number of heartbeats per second, we need to determine the total number of heartbeats and divide it by the total time interval.
First, let's calculate the total number of heartbeats:
4 + 6 + 10 + 12 = 32
Next, let's calculate the total time interval:
6 - 4 = 2 (seconds)
9 - 6 = 3 (seconds)
15 - 10 = 5 (seconds)
18 - 12 = 6 (seconds)
The total time interval is: 2 + 3 + 5 + 6 = 16 (seconds)
Finally, let's divide the total number of heartbeats by the total time interval to find the average number of heartbeats per second:
32 / 16 = 2 (heartbeats per second)
So, the average number of heartbeats per second is 2.