What does it mean by 2cm: 1unit on a graph

Astore manager records the total visitors and sales, in dollars, for 10 days. the data is shown in the scatter plot. what conclusion can the store manager draw based on the data? question 3 options: an increase in sales causes a decrease in visitors. an increase in sales is correlated with a decrease in visitors. an increase in visitors is correlated with an increase in sales.

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The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?