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drakelovermel

  • 2 years ago

Write the equation of the line that is perpendicular to the line 3x + y = 7 and passes through the point (6, -1).

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  1. waheguru
    • 2 years ago
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    Do you know how to solve this?

  2. drakelovermel
    • 2 years ago
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    nooo im soo lost

  3. waheguru
    • 2 years ago
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    What don't you understand

  4. drakelovermel
    • 2 years ago
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    i dont understand how to solve it. its been a long time since i did algebra and i cant remember how to do it

  5. waheguru
    • 2 years ago
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    Lets Do this step by step Do you know parallel and perpendicular lines ? And how the slope change in relation to each

  6. waheguru
    • 2 years ago
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    When a line is parallel to a line then the slope stays the same |dw:1343935655688:dw| Here as you can see the lines will never meet because the slopes are the same althought the y intercepts can be different, even if the slopes were 2 for the first line and 1.9 for the second they wound not be parallel *When a line is parallel to another line the slope is the same Perpendicular lines intersect at 90 degrees and for that to happend the slope must be the opposite reciprocal so if a line is parallel to 1/2, we find the reciprocal which is 2/1 and change it from a positive to negative so it becomes -2/1 Do you get this much

  7. waheguru
    • 2 years ago
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    Sorry I meant to say when a line is perpendicular for the second paragraph

  8. drakelovermel
    • 2 years ago
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    yes

  9. drakelovermel
    • 2 years ago
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    oh okay

  10. waheguru
    • 2 years ago
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    3x + y = 7 Here you need to find the equation of the line which is perpendicular to this equation so right of the bat we need to make this in to y=mx+b format right so we can get the slope Do you know how to change it in to y=mx+b format?

  11. waheguru
    • 2 years ago
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    Convert 3x + y = 7 in to y=mx+b @drakelovermel

  12. drakelovermel
    • 2 years ago
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    i sorta forgot. please refresh my memory

  13. waheguru
    • 2 years ago
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    This is algebra 3x + y = 7 you need to isolate y amd move everythin g on the right side y=-3x+7

  14. waheguru
    • 2 years ago
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    Do you understand

  15. drakelovermel
    • 2 years ago
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    yes

  16. waheguru
    • 2 years ago
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    Now what is the perpendicular slope to -3x?

  17. drakelovermel
    • 2 years ago
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    was it y=3x+7

  18. waheguru
    • 2 years ago
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    No we moved it so it became negative

  19. drakelovermel
    • 2 years ago
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    ohh okay i got you

  20. waheguru
    • 2 years ago
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    So...

  21. drakelovermel
    • 2 years ago
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    okay so whats to learn next?

  22. waheguru
    • 2 years ago
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    What is the perpendicular slope to -3x.

  23. drakelovermel
    • 2 years ago
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    heyy thanks for the help! you where very helpful but i have to go eat and my mom is calling me soo im soo srry but i got to go. but thanks!!!

  24. waheguru
    • 2 years ago
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    Np!

  25. jcyogi
    • 2 years ago
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    http://www.algebra.com/algebra/homework/Linear-equations/Linear-equations.faq.question.388924.html

  26. drakelovermel
    • 2 years ago
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    thank you soo much!

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