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Mathematics, 14.01.2020 01:31 skgoldsmith

Doctors have two methods of calculating maximum heart rate.
with the first method, maximum heart rate, y, in beats per minute
sy= 220 - x, where x is the person's age. maximum heart rate
with the second method is shown in the table. (example 1)
age, x
20 | 30 40 50 60
heart rate (bpm), y 194 187 180 173 1 66
2. are heart rate and age proportional or nonproportional for each method?

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with the first method, maximum hear...

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