The clinic chart from you family doctor supplements your health history at the hosptial. It can be very helpful if you have frequent visits of not very helpful if you hardly ever go to you family...
The rate of respiration is the number of breaths per minute. All you have to do is count either the number of breaths in OR out (not both) in one minute.
To get more reliable results, the experiment...
To measure data in a pie chart first you need to work out how big the whole thing is. Then when you get a amount of votes subtract it and you will find you answer quite easily
What you do is look at the gill flap located on the side of the fish, and every time it flaps, that is one breath. It is best to keep it still (use a net or something) to stop it from moving too much...