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Question

Equation of a line through the origin and perpendicular to, the line joining (a, 0) and (-a, 0), is
  1. y = ­–a
  2. y = 0
  3. x = 0
  4. x = –a


Solution

The correct option is C x = 0
The required equation passing through (0, 0) and its gradient is m=10, is y=10xx=0.

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