Use the figure below to answer the following questions. 
Figure 1A.4.5
-Consider the following information on cola sales by number of cases for a typical university residence floor: Price (dollars per case) 
Refer to Figure 1A.4.5.Which line shows the relationship of cola sales and its price when the temperature is 30°C?
Definitions:
Video Camera
A device capable of capturing moving images and audio, which can be stored digitally or on traditional media.
Natural Use Environment
The actual conditions and settings in which a product is used by consumers, as opposed to a controlled or artificial environment.
Focus Group
A research method that gathers a small, diverse group of people to discuss and provide feedback on a particular subject or product.
One-Way Mirror
A mirror that is reflective on one side and transparent on the other, often used in surveillance or research to observe people without being seen.
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