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caishaax3

  • one year ago

What is the equation of a vertical line passing through the point (3, −5)? A. y=-5 B. x=-5 C. y=3 D. x=3

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  1. triciaal
    • one year ago
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    |dw:1438572480910:dw|

  2. Caishaax3
    • one year ago
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    y=-5?

  3. triciaal
    • one year ago
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    which axis is vertical? the line through the point is parallel to the vertical axis

  4. Caishaax3
    • one year ago
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    vertical would be up and down therefore making it y=-5? correct

  5. Caishaax3
    • one year ago
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    ?

  6. triciaal
    • one year ago
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    vertical is up and down correct not y =

  7. triciaal
    • one year ago
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    |dw:1438572752351:dw|

  8. Caishaax3
    • one year ago
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    i dont get how it would be x when the x axis is horizontal

  9. jim_thompson5910
    • one year ago
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    @caishaax3 consider what points lie on this vertical line. What do all of these points have in common?

  10. Caishaax3
    • one year ago
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    hmmmm, i wanna say they fall on the x axis but i feel like im wrong

  11. jim_thompson5910
    • one year ago
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    we're given (3,-5) what's another point that lies on the vertical line?

  12. Caishaax3
    • one year ago
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    -3

  13. jim_thompson5910
    • one year ago
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    look at points directly above or below (3,-5)

  14. jim_thompson5910
    • one year ago
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    for instance, (3,2) lies directly above the given point |dw:1438573088091:dw|

  15. jim_thompson5910
    • one year ago
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    making sense?

  16. Caishaax3
    • one year ago
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    ok, do i plug that into a formula? to find my answer

  17. jim_thompson5910
    • one year ago
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    do you see how I got (3,2) ?

  18. Caishaax3
    • one year ago
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    you went over three up two

  19. jim_thompson5910
    • one year ago
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    yes

  20. jim_thompson5910
    • one year ago
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    and notice how it's directly above (3,-5)

  21. jim_thompson5910
    • one year ago
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    what is another point on this vertical line?

  22. Caishaax3
    • one year ago
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    (3, -1)

  23. jim_thompson5910
    • one year ago
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    good |dw:1438573350010:dw|

  24. jim_thompson5910
    • one year ago
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    how about one more point what's another point on this vertical line?

  25. Caishaax3
    • one year ago
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    (3, 4)

  26. jim_thompson5910
    • one year ago
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    |dw:1438573401061:dw|

  27. jim_thompson5910
    • one year ago
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    notice how all of the points plotted, and any other point we didn't get to, all have the same thing in common: they have an x coordinate of 3

  28. jim_thompson5910
    • one year ago
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    |dw:1438573439286:dw|

  29. Caishaax3
    • one year ago
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    so x=3

  30. jim_thompson5910
    • one year ago
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    yes. this vertical line is the equation x = 3 EVERY point on this line has an x coordinate of 3. The y coordinate doesn't matter

  31. Caishaax3
    • one year ago
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    thank you so much

  32. jim_thompson5910
    • one year ago
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    no problem

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