Please explain how to get answer?
Q = 40 – 2P
Suppose that the p in this equation refers to the price of a magazine subscription, and the q refers to the number of magazines to which Julie subscribes. Read the following statement carefully: “the more magazines Julie subscribes to, the less she is willing to pay for an additional magazine”
Which of the following best summarizes the pattern of casualty suggested by this statement?
- The relationshipbetween P and Q is not a casual relationship.
- A change in Qcauses a change in P.
- A change in Pcauses a change in Q.
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