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Linear Functions

SAT Math· difficulty 3/5

Line mm passes through (0,1)(0, 1) and is perpendicular to y=14x+5y = \frac{1}{4}x + 5. What is the equation of line mm?

  • A

    y=4x+1y = 4x + 1

  • B

    y=−14x+1y = -\frac{1}{4}x + 1

  • C

    y=−4x+1y = -4x + 1

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  • D

    y=14x+1y = \frac{1}{4}x + 1

Explanation

Perpendicular slope to 14\frac{1}{4} is −4-4. With y-intercept 1: y=−4x+1y = -4x + 1.

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