Question

The number of book and the cost vary ____.(directly or inversely)​

Answer 1

Answer:

direct relationships, an increase in x leads to a correspondingly sized increase in y, and a decrease has the opposite effect. This makes a straight-line graph. In inverse relationships, increasing x leads to a corresponding decrease in y, and a decrease in x leads to an increase in y.

Step-by-step explanation:

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Answer 2

Answer:

directly

Step-by-step explanation:

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