Answer:
When you are exercising, your muscles need extra oxygen some three times as much as resting muscles.
This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing
Rate of change is 1.50 / Initial value is 6 / y=mx=b / 15=1.50(6)+b /15=9+b / 6=b(initial value)
I don't think it's supposed to keep it numb but if I was to guest at least a few minutes I don't think it goes past 3
