Linear Functions

SAT Math· difficulty 4/5

The number of bricks bb varies directly with wall length LL. If b=240b = 240 for L=8L = 8 ft, what is bb for L=13.5L = 13.5 ft?

  • A

    405405

    check_circle
  • B

    420420

  • C

    390390

  • D

    400400

Explanation

Rate =240/8=30= 240/8 = 30; 30×13.5=40530 \times 13.5 = 405.

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