A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

can anyone explain how to do parabola's in great detail

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah..fire away

  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wat d u want to know exactly?

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    study all the four standard forms and the general forms of parabolae carefully...learn how to evaluate the vertex, latusrectum and directrix and focus and centre

  4. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how to figure out the vertex directrix and focus if they only give me a lil information

  5. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    giv me d info

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    vertex (-2,0) directrix y=-4 and i have 2 find the equation and graph it

  7. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (x+2)^2= 16y

  8. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok now can u teach me how to get that

  9. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sure

  10. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    u c if u have d directrix parallel to x-axis, its a vertical parabola upward or dwnward

  11. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    since here d vertex lies above d directrix its an upward parabola

  12. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so do i use (x-h)^2=4p(y-k)

  13. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah bingo...where p is the distance btween d vertex and directrix

  14. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    got it?

  15. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no i just know the formula 2 use but idk how 2 use it

  16. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    well now u kno

  17. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no i dont how did u get the answer wat are the steps wat did u plug in

  18. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    u kno d formula...jst remmbr u use dis only when the directrix is parallel to x-axis

  19. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    when d directrix is y=something, u use it

  20. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok but wat steps did u take to get the answer i knoow 2 use the fromula but idk how 2 get the answer

  21. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    see h and k are the x and y co-ordinates of the vertex. and p is the distance of the vertex from directrix

  22. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so far all i have is (x-2)^2=4py

  23. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so p=3???

  24. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    p is 4 the distance of -2,0 from y=-4

  25. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so p=-4

  26. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    4 distance is always positive

  27. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  28. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so uve got (x+2)^2 = 4.4(y)

  29. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks do you mind helping me wit some more

  30. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no i dont..

  31. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (x+2)^2=16y

  32. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wat i got

  33. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thats ryt i spose

  34. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    focus (0,0) directrix x=4

  35. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hold on on dat last one was my parabola suppose 2be upward and my directrix was suppose 2 go through it right???

  36. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no ur getting muddled up..the directrix doesnt go thru d parabola

  37. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    well when i graphed it it did cuz the y axis is vertical and not horizontial so is my parabola not facing the right way

  38. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no ur parabola shld touch the x-axis, pass thru -2,0 and the directrix should be 4 units below it

  39. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok i had it right the 1st time so on to the next one lol

  40. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ws i wrong?

  41. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    idk lol idc 4real im sick of dis class

  42. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ready 2 help me wit the other 1

  43. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah

  44. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    focus (0,0) directrix x=4

  45. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    wat way will the directrix be going

  46. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    vertical

  47. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  48. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now 2 figure out the equation do i use (y-k)^2=4p(x-h)

  49. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and is this going 2 be opening to the left

  50. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ur right...u do it quite well..yr u sick of it?

  51. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y^2=-16x

  52. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cuz idk how 2 do it im just guessing

  53. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no bt ur guessin right so u shld get confidence

  54. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so wat is the vertex and if i dont have (h,k) do i use x,y

  55. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    use 0,0 for h,k..so its y^2=-16x

  56. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so anytime i dont have the vertex use 0,0

  57. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    bt ur vertex is given 0,0

  58. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    dat was the focus

  59. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    OH IMSORRY

  60. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    rly sorry..bt u cn frgv a lovesick man cant u...

  61. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol sure so how do i do it

  62. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    neway so the vertex is the midpt of the focus and the pt where d directrix meets the axis

  63. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i need numbers to do the formula

  64. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so its d midpt of 0,0 and 4,0

  65. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so the vertex is 2,0

  66. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oooooo ok but y lol

  67. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ur having fun arent u...d midpt of 0,0 and 4,0 is (0+4)/2, 0+0/2

  68. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    vertex is d midpt of the focus and the directrix meeting the axis

  69. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    u should be my teacher u making it simple my teacher is making it hard ok so i can always use dat when i am givin the focus and directrix right

  70. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is the answer y^2=-8px

  71. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thnx fr d compliment..wt grade r u in?

  72. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    11th

  73. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    im in ap math

  74. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    nahi...replace d x with (x-2)

  75. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cz d vertex is 2,0

  76. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so y^2=4p(x-2)

  77. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah

  78. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok dis one i did they gave me the center (-7,3) and the focus (-7,5) i got (x+7)^2=-24y is dat right

  79. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (x+7)^2 = 8(y-3)

  80. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  81. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now the other problems r harder they gave me just a graph wit the drawing already made so i hope i can explain dis 2 u

  82. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    try

  83. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the is (-4,3) and the directrix is (7,2.5)

  84. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ur doing somthin wrng

  85. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the vertex was the (-4,3)

  86. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is it (x-3)^2=4p(y+4)

  87. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah

  88. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  89. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok the vertex is (-2,_6) and they gave me 2.25 wat do i do

  90. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (-2,-6)

  91. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    whts dis 2.25

  92. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    x=2.25

  93. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so its (y+6)^2 = - 17(x+2)

  94. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    where u get -17

  95. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    4.25 x 4

  96. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    where u get 4.25

  97. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    distance of -2 from 2.25

  98. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    u lost me now i have (y=6)^2=4p(2.25+2)

  99. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (y+6)^2

  100. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    = 4.25(4) (x+2)

  101. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so p=4.25

  102. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah right

  103. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but how u know to do 2.25+2 then to make dat p

  104. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    remmbr its d distance between d vertex and directrix

  105. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now im all lost x=2.25 is the directrix right

  106. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes and x=-2 is the vertex so d distance of it from 2.25 is 4.25

  107. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    my bad the directrix is x=-2.5

  108. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    x=-2.25

  109. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so its only .25

  110. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its from -2 to 2.25 so it 2.25 - (-2) = 4.25

  111. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no if vertex is -2 and the directrix is -2.25 there only 1/4 apart

  112. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    am i wrong

  113. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if directrix is 2.25 then yes

  114. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no the directrix is negative

  115. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so wats the new answer

  116. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    then ur right

  117. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so (y+6)^2=p(x+2)

  118. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah

  119. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yay thank u so much

  120. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    r u good at doing dis wit word problems

  121. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    nvm if i get stuck ill post it but thanks 4 all ur help

  122. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no prob

  123. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    can u help me

  124. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.