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Sup_open~study

  • 3 years ago

Use the formula for slope to verify that a horizontal line has a slope of zero and that a vertical has an undefined slope. I have no idea what to do can some one help explain it to me thanks. :)

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  1. hartnn
    • 3 years ago
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    The slope of the line through points (x1,y1) and (x2,y2) is given by : \(\huge m=\frac{y_1-y_2}{x_1-x_2}\) now horizontal line has equation of the form y=c, here xterm has '0' co-efficient take any two points on this, say (x1,c),(x2,c) so put y1 = c and y2 = c in m and tell me what u get.

  2. Sup_open~study
    • 3 years ago
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    i'm sorry i don't get what the y = c part ??

  3. hartnn
    • 3 years ago
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    i'll draw a horizontal line|dw:1348817053391:dw| can u see that y-co ordinate of every point on that line is same??

  4. Sup_open~study
    • 3 years ago
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    yes

  5. hartnn
    • 3 years ago
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    that means for any value of x-coordinate , y co-ordinate will be some constant 'c' only.....so we can write its equation as y=c got this?

  6. Sup_open~study
    • 3 years ago
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    i think so the y will stay the same ( constant) meaning y = c ??

  7. hartnn
    • 3 years ago
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    yup. similarly for vertical line , the equation is x=c

  8. Sup_open~study
    • 3 years ago
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    i don't get the x=c part ??

  9. hartnn
    • 3 years ago
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    |dw:1348817443207:dw| can u see that x-co ordinate of every point on that vertical line is same

  10. Sup_open~study
    • 3 years ago
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    one is smaller than the other ??

  11. Sup_open~study
    • 3 years ago
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    so they are not really the same ??

  12. hartnn
    • 3 years ago
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    for a vertical line, x co-ordinate always remains constant. hence its equation can be written as x=c did u understand this?

  13. Sup_open~study
    • 3 years ago
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    yes i think i kind of get what what you are saying

  14. hartnn
    • 3 years ago
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    now reply to my first comment

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