Problem: A team of students want to study the effects of temperature on bacteria growth. They put the dishes in different places; incubator 37c, a lab room (21c), refrigerator (10c) and a freezer (0c). Bacterial growth is measured by estimating the percentage of each dish that is covered by bacteria at the end of a 3 days growth period. What type of graph would be used to present these data? Explain why?