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lolly Group Title

What is an equation for the line that passes through points (–1, –4) and (1, 4)? Write the equation in slope-intercept form. (2 points)

  • one year ago
  • one year ago

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  1. surdawi Group Title
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    y = mx + b m=(y2-y1)/(x2-x1)

    • one year ago
  2. surdawi Group Title
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    @lolly wanna try

    • one year ago
  3. lolly Group Title
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    no..but i will..:)

    • one year ago
  4. Swageraid32 Group Title
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    (1,-4), m = -4 y = mx + b Sub to find b -4 = -4*1 + b b = 0 ------- y = -4x m = -4 means slope = -4. slope-intercept form of equation of a straight line is y = mx + b. m is the slope. b is the y-intercept. your equation starts of with the slope-intercept generic form of y = mx + b replace m with -4 to get y = -4x + b your line goes through the point (x,y) = (1,-4) that means the x-coordinate is 1 and the y coordinate is -4. to find the y-intercept, you replace y with -4 and x with 1 in the equation and solve for b. your equation of y = -4x + b becomes: -4 = (-4 * 1) + b

    • one year ago
  5. lolly Group Title
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    can you set up the equation? then ill solve:P

    • one year ago
  6. surdawi Group Title
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    @swiftskier96 is that the answer http://www.algebra.com/algebra/homework/Graphs/Graphs.faq.question.233716.html hahaha

    • one year ago
  7. surdawi Group Title
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    (x1,y1) = (–1, –4) (x2,y2) = (1, 4)

    • one year ago
  8. lolly Group Title
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    soo y=mx=b? isnt that for finding slope?

    • one year ago
  9. surdawi Group Title
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    yes but you need to find m 1st \[y=\frac{ y2-y1 }{ x2-x1 }\]

    • one year ago
  10. surdawi Group Title
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    meant m =

    • one year ago
  11. lolly Group Title
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    ook ill try it..hold on..:)

    • one year ago
  12. lolly Group Title
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    m=-6

    • one year ago
  13. lolly Group Title
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    now what?

    • one year ago
  14. surdawi Group Title
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    show me how?

    • one year ago
  15. surdawi Group Title
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    m is wrong :D

    • one year ago
  16. lolly Group Title
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    really?

    • one year ago
  17. lolly Group Title
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    m= 1-4/-1--4. m=-3/3 m=-6

    • one year ago
  18. surdawi Group Title
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    (x1,y1) = (–1, –4) (x2,y2) = (1, 4) x1 = -1 y1 = -4 x2 = 1 y2 = 4

    • one year ago
  19. chrispearson813 Group Title
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    hi lolly :P

    • one year ago
  20. lolly Group Title
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    right..thats what i did..,.i think..?

    • one year ago
  21. lolly Group Title
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    hi..:)

    • one year ago
  22. 03225186213 Group Title
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    (y-y1)/(y2-y1)=(x-x1)/(x2-x1)

    • one year ago
  23. lolly Group Title
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    @surdawi how did i do it rong?

    • one year ago
  24. surdawi Group Title
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    (4- - 4)/(1- -1)= 8/2=4

    • one year ago
  25. lolly Group Title
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    so m is 4?

    • one year ago
  26. surdawi Group Title
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    what you did (x2-y2)/(x1-y1)

    • one year ago
  27. lolly Group Title
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    well i thought it was -6..but its not..?

    • one year ago
  28. surdawi Group Title
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    m = 4 now you choose wither point and solve for b y = 4x + b

    • one year ago
  29. lolly Group Title
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    k hold on ill try again..:)

    • one year ago
  30. surdawi Group Title
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    \[m=\frac{ y2-y1 }{ x2-x1 }=\frac{ 4- -4 }{ 1- -1 }=\frac{ 8 }{ 2 }=\]

    • one year ago
  31. 03225186213 Group Title
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    for slope slope=(y2-y1)/(x2-x1) it can be directly solve see the formula that i have given already

    • one year ago
  32. 03225186213 Group Title
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    (y-y1)/(y2-y1)=(x-x1)/(x2-x1)

    • one year ago
  33. lolly Group Title
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    oooh!!! i got the x1and 2s switched up..ok i see..:)

    • one year ago
  34. surdawi Group Title
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    |dw:1351797990809:dw|

    • one year ago
  35. lolly Group Title
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    the one with less numbers right?

    • one year ago
  36. surdawi Group Title
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    there is no zeros for x or y this time so pick one and solve, it doesnt matter which one

    • one year ago
  37. lolly Group Title
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    which one would be easier?

    • one year ago
  38. surdawi Group Title
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    either, same thing

    • one year ago
  39. lolly Group Title
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    k ill do the one with less numbers..:P

    • one year ago
  40. lolly Group Title
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    so 4=4x1=b? 4=b..but we already knew that..

    • one year ago
  41. surdawi Group Title
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    both of them has same amount of numbers :p 4=4x1=b? ! why is there an equal to b

    • one year ago
  42. lolly Group Title
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    oooh! whoop..my bad..:)

    • one year ago
  43. lolly Group Title
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    so 4=4+4...

    • one year ago
  44. lolly Group Title
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    4=8? that dosent make sense...

    • one year ago
  45. surdawi Group Title
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    4=4x1+ b what is x1 = ?

    • one year ago
  46. lolly Group Title
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    -1

    • one year ago
  47. surdawi Group Title
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    y1 =?

    • one year ago
  48. lolly Group Title
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    -1

    • one year ago
  49. lolly Group Title
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    000h!!!

    • one year ago
  50. lolly Group Title
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    no it dosent..:)

    • one year ago
  51. lolly Group Title
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    -4

    • one year ago
  52. surdawi Group Title
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    it should be one of the pairs either (1,4) or (-1,-4) -4 = 4*(-1) + b

    • one year ago
  53. lolly Group Title
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    -4=4x-1=4?

    • one year ago
  54. surdawi Group Title
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    4*-1=?

    • one year ago
  55. lolly Group Title
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    -4

    • one year ago
  56. surdawi Group Title
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    -4 = -4 + b how can you keep b on one side?

    • one year ago
  57. lolly Group Title
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    by adding 4 to b?

    • one year ago
  58. surdawi Group Title
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    ok show me how?

    • one year ago
  59. lolly Group Title
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    -4=-4+b (then the 4 crosses out) +4 +4

    • one year ago
  60. surdawi Group Title
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    -4 +4 = -4 + 4 +b 0 = b y = 4x + 0

    • one year ago
  61. lolly Group Title
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    where did the other set of -4=4 come from?

    • one year ago
  62. surdawi Group Title
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    you have to add 4 to both sides

    • one year ago
  63. surdawi Group Title
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    passes through points (–1, –4) and (1, 4)?

    • one year ago
  64. surdawi Group Title
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    Anamaria what grade you in?

    • one year ago
  65. lolly Group Title
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    10.:)

    • one year ago
  66. surdawi Group Title
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    you should know how to add :P

    • one year ago
  67. lolly Group Title
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    lol i do know how to add:)

    • one year ago
  68. lolly Group Title
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    -4=-4+b (then the 4 crosses out) +4 +4 was this rong?

    • one year ago
  69. lolly Group Title
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    lol @surdawi u sleeping?

    • one year ago
  70. surdawi Group Title
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    i went to pray |dw:1351801108941:dw|

    • one year ago
  71. lolly Group Title
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    lol were u praying that id understand how to do this? lol jk ook umm anyway i thought b=4?

    • one year ago
  72. surdawi Group Title
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    lol muslims pray 5 times a day not only sundays :P ok plug in b = 4 to check y = 4*x + 4 (1, 4) 4 = 4*1 + 4 4 = 8? is that right

    • one year ago
  73. lolly Group Title
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    4 is not 8...? im so confused!!

    • one year ago
  74. surdawi Group Title
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    thats would be the answer if b was 4 correct answer is y = 4x + 0 = 4x plug in and check and where is my medal at??

    • one year ago
  75. surdawi Group Title
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    do you want me to give you problem to do?

    • one year ago
  76. surdawi Group Title
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    try solving this What is an equation for the line that passes through points (2,5) and (6,7)? Write the equation in slope-intercept form. (you pay $10 hehe)

    • one year ago
  77. lolly Group Title
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    noo i dont want another problem im too stuck with this one..:)

    • one year ago
  78. surdawi Group Title
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    tell what you dont understand |dw:1351802673845:dw|

    • one year ago
  79. lolly Group Title
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    i dont really understand what you did..like at all... for the one on the right side...

    • one year ago
  80. surdawi Group Title
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    ok (-1,-4) now we need to substitute that into y =mx + b y = -4 x = -1 m = 4 y = m* x + b -4 = 4*(-1) + b -4 = -4 + b we now need to add a 4 to both sides -4 = -4 + b +4 +4 -------------- 0 = 0 + b ===> b = 0

    • one year ago
  81. lolly Group Title
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    ok so b = 4 and 0?

    • one year ago
  82. surdawi Group Title
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    no only 0 how do you get the 4?

    • one year ago
  83. lolly Group Title
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    what we did earlier..

    • one year ago
  84. surdawi Group Title
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    we never got b = 4 we got m is 4

    • one year ago
  85. lolly Group Title
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    oooh!!!

    • one year ago
  86. surdawi Group Title
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    i have to go to my Advance Engineering Math :( right now; which doesnt look like anything on here...try to figure it out; if you still have problems feel free to message me the answer is y = 4x

    • one year ago
  87. lolly Group Title
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    k thanks 4 ur help:)

    • one year ago
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