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UPCAT Mathematics practice question 39: What is the slope of any line perpendicular to y = 2x + 1?

Correct answer

B. −1/2

Perpendicular slopes are negative reciprocals, and the negative reciprocal of 2 is −1/2.

What is the slope of any line perpendicular to y = 2x + 1?

  1. 2
  2. −1/2Correct
  3. −2
  4. 1/2

Why B is correct

Perpendicular slopes are negative reciprocals, and the negative reciprocal of 2 is −1/2.

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