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shaleiah

  • one year ago

Please help

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  1. shaleiah
    • one year ago
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    @Nnesha Did I graph these 3 points, right?

  2. Nnesha
    • one year ago
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    hmm \[\huge\rm y=a(x-h)^2+k\] vertex form of parabola where (h,k) is the vertex point and find x and y intercepts

  3. Nnesha
    • one year ago
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    x-intercept is a point where line intersect x-axis when y=0 so substitute y for 0 to find x intercept y-intercept is a point where line intersect y-axis when x=0 so substitute x for y to find y-intercept

  4. shaleiah
    • one year ago
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    The vertex is (4,1)

  5. Nnesha
    • one year ago
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    right

  6. shaleiah
    • one year ago
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    what are the next steps?

  7. Nnesha
    • one year ago
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    alright and bec a is negative in the question so we would get max point (graph opens down)

  8. Nnesha
    • one year ago
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    so max would be at ((4,1) |dw:1443814926678:dw|

  9. Nnesha
    • one year ago
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    now find x intercept

  10. Nnesha
    • one year ago
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    hmm highest degree is 2 so you should get 2 xintercepts 4 isn't correct

  11. shaleiah
    • one year ago
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    okay, (9,7)

  12. Nnesha
    • one year ago
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    hmm how did you get that ?

  13. shaleiah
    • one year ago
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    I graphed it on my calculator

  14. Nnesha
    • one year ago
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    hmm make sure you typed the correct equation

  15. shaleiah
    • one year ago
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    Alright, I got x=0 and y=-63

  16. Nnesha
    • one year ago
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    yeah that's y-intercept now substitute y for 0 to find x-intercept

  17. Nnesha
    • one year ago
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    let me know if u don't know how to solve for x

  18. shaleiah
    • one year ago
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    (0,-1)

  19. shaleiah
    • one year ago
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    help

  20. Nnesha
    • one year ago
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    alright wait a sec

  21. Nnesha
    • one year ago
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    \[\huge\rm 0=-4(x-4)^2+1\] do you know the quadratic formula ?

  22. Nnesha
    • one year ago
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    (x-4)^2 is same as (x-4)(x-4) foil it

  23. Nnesha
    • one year ago
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    familiar with the foil method ?

  24. Nnesha
    • one year ago
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    hmmm better use calculator instead google i didn't get 16

  25. Nnesha
    • one year ago
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    make sure you are looking at the right question

  26. shaleiah
    • one year ago
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    (0,16)

  27. Nnesha
    • one year ago
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    i have no idea how u got that please show some work we need x intercepts when y =0

  28. shaleiah
    • one year ago
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    -sighs- I typed it in my calculator. (x-4)^2 and graphed, it showed x=0 and y=16

  29. Nnesha
    • one year ago
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    hmm well ur equations is -4(x-4)^2 +1 that's what u should type into the calculator

  30. shaleiah
    • one year ago
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    lots of step lol

  31. shaleiah
    • one year ago
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    steps*

  32. Nnesha
    • one year ago
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    will if you want to solve by hand to find x-itnercepts then yes there are lots of steps if you want to use calculator then there are none

  33. Nnesha
    • one year ago
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    well* ...

  34. shaleiah
    • one year ago
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    Alright, I typed it in. Graphed. X=0

  35. Nnesha
    • one year ago
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    lol i was about to post ur question on others thread :D

  36. shaleiah
    • one year ago
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    I'm sorry, I am not that good at math, I'm barely on an intermediate level.

  37. Nnesha
    • one year ago
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    or here is another way to graph x-coordinate of vertex is 4 right so draw a table |dw:1443819080897:dw| now substitute those points to find y coordinate

  38. Nnesha
    • one year ago
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    no i have so man tabs open so that's why

  39. Nnesha
    • one year ago
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    many*

  40. Nnesha
    • one year ago
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    do you understand that ?

  41. Nnesha
    • one year ago
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    don't need to find x-intercepts just substitute x for the points in the table that's it

  42. shaleiah
    • one year ago
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    Okay

  43. shaleiah
    • one year ago
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    @Nnesha

  44. Nnesha
    • one year ago
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    vertex is max point min = minimum max = maximum |dw:1443820566646:dw|

  45. Nnesha
    • one year ago
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    |dw:1443820718145:dw| if the vertex is at (4,1) that would be the maxx point

  46. Nnesha
    • one year ago
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    |dw:1443820739973:dw| this point should be the max that's why to find other two points we should go up 2 and down 4 from the x-coordinate of the vertex

  47. Nnesha
    • one year ago
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    |dw:1443820778704:dw| use this table substitute x for its value from the table then solve for y