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Linear Equations in One Variable

SAT Math· difficulty 4/5

The points (1,k)(1, k) and (4,11)(4, 11) lie on a line with slope 22. What is the value of kk?

  • A

    9

  • B

    3

  • C

    7

  • D

    5

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Explanation

11−k4−1=2\frac{11 - k}{4 - 1} = 2, so 11−k=611 - k = 6 and k=5k = 5.

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