Linear Functions

SAT Math· difficulty 4/5

The cost CC varies directly with weight ww. If C = \18forforw = 6lb,whatislb, what isCforforw = 11$ lb?

  • A

    \36$

  • B

    \30$

  • C

    \31$

  • D

    \33$

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Explanation

k=18/6=3k = 18/6 = 3; C=3(11)=33C = 3(11) = 33.

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