How are the variables related at various points on the graph?
A
The volume increases steadily as someone blows up the balloon, until it reaches its
maximum volume.
B
The volume increases each time someone blows in the balloon, and it stays constant each time the person pauses to breathe. When the balloon pops in the middle of the fourth blow, the volume decreases to 0.
C
The volume increases each time someone blows in the balloon, and it stays constant each time the person pauses to breathe. When the balloon pops in the middle of the fifth blow, the volume decreases to 0.