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anonymous

  • one year ago

write an equation in the form y=mx+b for the line which passes through (1,-10) and (-7,-2)

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  1. pooja195
    • one year ago
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    First we need to find the slope any ideas on how to find it?

  2. anonymous
    • one year ago
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    ok know how to do that give me a min

  3. anonymous
    • one year ago
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    slopes -1

  4. pooja195
    • one year ago
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    ok next are you fimilar with the point slope formula?

  5. anonymous
    • one year ago
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    not really can you remind me

  6. pooja195
    • one year ago
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    \[\huge~y-y_1=m(x-x_1)\] m=slope int his case -1 next we select any random post lets go with (1,-10) so 1 = x1 -10=y1 now you just plug it into the formula

  7. pooja195
    • one year ago
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    Are you ok with that? Do you know how to do it?

  8. pooja195
    • one year ago
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    stuck? :/

  9. anonymous
    • one year ago
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    a little

  10. pooja195
    • one year ago
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    \[\huge~y--10=-1(x-1)\]

  11. pooja195
    • one year ago
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    therefore we have \[\huge~y+10=-1(x-1)\] now distribute \[\huge~-1(x-1)\]

  12. anonymous
    • one year ago
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    8

  13. pooja195
    • one year ago
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    huh?

  14. anonymous
    • one year ago
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    hold on messed up bad not smart at algebra at all

  15. pooja195
    • one year ago
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    need help? :)

  16. anonymous
    • one year ago
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    yes i need all the help i can

  17. pooja195
    • one year ago
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    therefore we have \[\huge~y+10=-1(x-1)\] now distribute \[\huge~-1(x-1)\]

  18. pooja195
    • one year ago
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    distribute :)

  19. pooja195
    • one year ago
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    -1 * x = ? -1 * -1 =?

  20. anonymous
    • one year ago
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    any thing that x right

  21. pooja195
    • one year ago
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    -1x :) -1 * -1= ?

  22. anonymous
    • one year ago
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    1

  23. pooja195
    • one year ago
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    good so we have \[\huge~y+10=-1x+1\] we are trying to isolate y so what would the next step be?

  24. anonymous
    • one year ago
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    so what your saying is get rid of 10 or change y

  25. pooja195
    • one year ago
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    get rid of the 10

  26. anonymous
    • one year ago
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    do i subtract 1 from 10

  27. pooja195
    • one year ago
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    yes so 1-10= ?

  28. anonymous
    • one year ago
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    -9

  29. pooja195
    • one year ago
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    good so we get \[\huge~y=-1x-9\] thats all :)

  30. anonymous
    • one year ago
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    thank you thank you thank you :)

  31. pooja195
    • one year ago
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    :)

  32. pooja195
    • one year ago
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