a student who studies the sizes of a group of birds records data for this group of ducks wich term describes the relationship between the two variables in this graph

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the correct answer would be b) volume versus temperature, because they are also directly proportional.