Linear Functions

SAT Math· difficulty 4/5

Function f(t)=2004.5tf(t) = 200 - 4.5t models book sales (in hundreds) at price \t.Theslope. The slope -4.5$ means:

  • A

    Price drops 4.5 per book

  • B

    Sales increase with price

  • C

    200 books sold at $0

  • D

    Books sold drop by 4.5 hundred per dollar increase

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Explanation

Negative slope: each \1priceincreasedropssalesbyprice increase drops sales by450$ books.

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