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Mathhelp346

Write an equation that contains the given point and is perpendicular to the given line: (4,-1), y=-8

  • one year ago
  • one year ago

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  1. Mathhelp346
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    I tried \[y-y _{1}=m(x-x _{1})\] but i would always get a value for y which isnt right

    • one year ago
  2. tejasree
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    I think it is x = 4, thats the equation

    • one year ago
  3. Mathhelp346
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    how did you get that

    • one year ago
  4. tejasree
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    y = -8 is a horizontal line, the line is perpendicualr to a vertical line, get it?

    • one year ago
  5. Mathhelp346
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    yea

    • one year ago
  6. tejasree
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    so with a vertical line, x will equal one number, in this case, it is 4, always 4 for any y, so its x = 4, did i confuse u?

    • one year ago
  7. Mathhelp346
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    well how did you get x=4?

    • one year ago
  8. tejasree
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    it said that it has to contain (4, -1) so that's how I figured that x has to equal 4

    • one year ago
  9. tejasree
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    Some points of x = 4 are: (4,2)(4,8),(4,-6).......so one....understand?

    • one year ago
  10. Mathhelp346
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    so you just took the 4 from the pair?

    • one year ago
  11. tejasree
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    yup, if i included another x-value along with the pair we have, its not going to be perpendicular, that's why

    • one year ago
  12. Mathhelp346
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    oh ok thanks

    • one year ago
  13. tejasree
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    yea! Thanks :)

    • one year ago
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