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For each pair of variables, indicate what association you expect: positive, negative or none. Provide a sentence explaining your reasoning for each pair of variables. Extra credit will only be granted for solutions that include an explanation.

a. A person's height; the person's weight.

b. A person's blood alcohol level; That person's ability to solve a puzzle.

c. A person's salary; the size of a person's house

d.The number of pool passes sold weekly; The number of bikes sold weekly.

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