Linear Functions

SAT Math· difficulty 4/5

At a constant speed, a car uses 3 gal of gas to travel 84 mi. How many gallons for 196 mi?

  • A

    66

  • B

    77

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  • C

    55

  • D

    88

Explanation

Rate =84/3=28= 84/3 = 28 mi/gal; 196/28=7196/28 = 7 gallons.

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