Situation #1: The height of a person over
his or her lifetime.  See Figure 1.2.

Situation #2: The circumference of a circle 
as its radius changes. See Figure 1.3.

Situation #3: The height of a ball as it is 
thrown into the air. See Figure 1.4.

Situation #4: The amount of observable mold 
on a piece of bread sitting at room 
temperature from the time it is baked to 
severalmonths later. See Figure 1.5.

Situation #5: The daily average low 
temperature in degrees Fahrenheit in 
Fairbanks, Alaska from January 1 to 
December 31. See Figure 1.6.

Situation #6: The temperature of a cold 
drink left in a warm room. See Figure 1.7.