what is dy/dx when the normal is parallel to x axis?

I know that dy/dx is 0 when the tangent of a line is parallel to the x axis. But how about for the normal?

Update:

can anyone also tell me if it is conversely true that when the normal is parallel to the y axis, dy/dx is 0?

2 Answers

Relevance
  • 7 years ago
    Favorite Answer

    Normal means per. To tangent.so normal will parallel to y axis.and dy/dx=undefined

    Source(s): Neo!
  • Lesus
    Lv 7
    7 years ago

    Infinity.

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