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Linear Functions

SAT Math· difficulty 4/5

A magazine sells 10000 copies at \3.Foreach. For each $0.10pricehike,100fewercopiessell.Linearrelationbetweencopiesprice hike, 100 fewer copies sell. Linear relation between copiesNandpriceand pricepforforp \ge 3$:

  • A

    N=10000−100(p−3)N = 10000 - 100(p - 3)

  • B

    N=10000−100pN = 10000 - 100p

  • C

    N=10000+1000(p−3)N = 10000 + 1000(p - 3)

  • D

    N=10000−1000(p−3)N = 10000 - 1000(p - 3)

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Explanation

Per \0.10rise,lose100;perrise, lose 100; per$1$ rise, lose 1000.

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