Question

a doctor observes a graph that shows the electrical activity (in volts) of the heart of a patient over a period of time (in seconds). each spike corresponds to one heart beat. the doctor needs to calculate the heart rate of the patient in beats per minute. what is the heart rate of this patient?
square beats per minute

Explanation:

Step1: Count beats and time interval

From the graph, there are 7 beats over 6 seconds.

Step2: Calculate beats per second

$\frac{7}{6}$ beats per second

Step3: Convert to beats per minute

Multiply by 60 (seconds in 1 minute): $\frac{7}{6} \times 60$

Answer:

70 beats per minute