Hi there!
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I believe your answer is:
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Here’s why:

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Hope this helps you. I apologize if it’s incorrect.
The variable was whether people approve or disapprove of the president. They were trying to poll just the people that live in the main part of the USA. There is slight bias that comes from excluding Alaska and Hawaii.
Answer:
The answer is -7
Step-by-step explanation:
I took the test! Hope this helps <3
112.5
60
Hope you know how to use a graph
A(3,0) B(9,0) C(9,6)