The difference in elevation of points between a vertical and a tangent is

- 1
  
  directly proportional to its horizontal distance from the point of tangency
- 2
  
  Inveresely proportional to its horizontal distance from the point of tangency
- 3
  
  directly proportional to the square of its horizontal distance from the point of tangency
- 4
  
  inversely proportional to the square of its horizontal distance from the point of tangency

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