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Math Help - Standard form of equation that passes through this line

  1. #1
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    Standard form of equation that passes through this line

    (-5,11) and (-5,-2)

    The thing is, I get it and it divides by zero. Am I doing something wrong?
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  2. #2
    Junior Member bleesdan's Avatar
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    Nope! This one is a trick question!

    We have a line that passes through (-5,11) and (-5,2).

    What is the same about those two points?
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  3. #3
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    The x's are the same!

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  4. #4
    Super Member wingless's Avatar
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    Do you see it now?

    OK, now here's the hint:
    All points lying on the line that passes through these two points have the same x.
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  5. #5
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    Oh!

    ...oh, okay.

    So hold on:

    is it

    y = 1x + 0?

    or...

    ...
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  6. #6
    Super Member wingless's Avatar
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    No!
    "All x's are -5", express this mathematically!
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  7. #7
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    All x's are -5?

    So.

    x = -5?

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  8. #8
    Super Member wingless's Avatar
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    Quote Originally Posted by mankvill View Post
    All x's are -5?

    So.

    x = -5?

    Absolutely!

    x=-5 represents all points that have the same x, -5. So this is the line we were looking for.
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  9. #9
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    Quote Originally Posted by wingless View Post
    Absolutely!

    x=-5 represents all points that have the same x, -5. So this is the line we were looking for.
    ...really?

    ...huh. So the answer to the question is just x = 5?

    ...very strange. I'll keep that in mind in the future!

    Thanks a ton!
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  10. #10
    Super Member wingless's Avatar
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    Quote Originally Posted by mankvill View Post
    ...really?

    ...huh. So the answer to the question is just x = 5?

    ...very strange. I'll keep that in mind in the future!

    Thanks a ton!
    Also consider what happens when y=3. And try to graph it.
    You're welcome
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