Final answer:
To calculate heart rate from beats counted in a given time, double the beats if counting was done over 30 seconds to get beats per minute. For an exercise heart rate of 150 beats per minute, the time per beat is 0.4 seconds. Interpret statistical results like slope and y-intercept in the context of the data provided.
Step-by-step explanation:
To find the heart rate given the number of beats in a specific time span, the standard method involves converting the number of beats counted into beats per minute. For instance, if someone counts 40 beats in 30 seconds, to find the heart rate in beats per minute, you would double the number of beats counted as there are 60 seconds in a minute, not 30. Thus, the heart rate would be 40 x 2 = 80 beats per minute.
For a person undergoing strenuous exercise, if the heart rate is 150 beats per minute, the time per beat can be calculated by taking the reciprocal of the heart rate and converting it into seconds. So, 1 minute divided by 150 beats gives the time per beat, which after converting minutes to seconds (1 minute = 60 seconds), comes out to be 60 / 150 = 0.4 seconds per beat.
In the case of an exercise involving plotting data or determining statistical figures like slope and y-intercept, interpret the results in the context of the data set. For example, a negative slope in the context of time spent swimming and heart rate would imply that a longer swim results in a lower heart rate. For experiments or exercises like the ions dating game or plotting data like sleep hours, students must employ critical thinking to find relationships and patterns.