GMAT 考满分题库

- 数学PS -
The function of a straight line in the rectangular coordinate system is y=5x. If a straight line K is perpendicular to line y=5x, which of the following could be the expression of the line K ?
  • Ay=-5x
  • By=x/5
  • Cy=-x/5
  • Dy=-1/(5x)
  • Ey=1/(5x)
显示答案
正确答案: C

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