your pulse rate is higher because ur heart beats faster than what it breathes
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births, death, immigration and emigration
The birth rate and the Death rate are equal, providing there is no immigration/emigration of the population.
If the birth rate is higher than the death rate, the population increases. If the death rate is higher than the birth rate, the population decreases.
The population decreases when the death rate is higher than the birthrate.
the rate of change is related to the slope; the higher the slope, the higher the rate. If the line is vertical, that is infinite slope or infinite rate of change which is not possible