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18jonea

  • one year ago

Write an equation of a line that passes through (-3, 4) with slope -. @amistre64

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  1. amistre64
    • one year ago
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    what formula of a line equation implements a slope and a point?

  2. 18jonea
    • one year ago
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    y-y1= m (x-x1)

  3. amistre64
    • one year ago
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    then all we need to do is plug in the values ...

  4. amistre64
    • one year ago
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    what do we end up with? and you have not posted a readable m value yet

  5. 18jonea
    • one year ago
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    -1/2

  6. 18jonea
    • one year ago
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    is the slope

  7. amistre64
    • one year ago
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    ok, then i can verify your results

  8. 18jonea
    • one year ago
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    y-4= -1/2 (x+3)

  9. amistre64
    • one year ago
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    yep, looks good. that is an equation of a line.

  10. amistre64
    • one year ago
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    if need be we can rewrite it as y=(stuff) distribute and add thru the 4

  11. amistre64
    • one year ago
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    but the question doesnt imply what form is required for a solution.

  12. 18jonea
    • one year ago
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    y=

  13. 18jonea
    • one year ago
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    so How would I find the y intercept

  14. amistre64
    • one year ago
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    the y axis, is also the x=0 axis ... so the intercept when x=0 is found when we let x=0

  15. amistre64
    • one year ago
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    y-4= -1/2 (x+3) y-4= -1/2 (0+3) y-4= -3/2 what is our y value?

  16. 18jonea
    • one year ago
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    2.5

  17. 18jonea
    • one year ago
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    so y=-1/2x +2.5

  18. amistre64
    • one year ago
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    the other method which i suggested works just the same ... y-4= -1/2 (x+3) y-4= -x/2 -3/2 y= -x/2 -3/2 +4 unless you require decimals, i would keep it all in ratioed numbers y int = 5/2

  19. amistre64
    • one year ago
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    not that it matters, its just a visual thing that some teachers adhere to.

  20. 18jonea
    • one year ago
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    I got it thank you

  21. amistre64
    • one year ago
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    :) youre welcome

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