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MoreFlares Group Title

Can anyone explain how to solve this problem? If you would like any graphic design work or video editing in exchange for a lesson I am a graphic designer. Skype: mrpfister229 Suppose a parabola has vertex (–4, 7) and also passes through the point (–3, 8). Write the equation of the parabola in vertex form

  • 2 years ago
  • 2 years ago

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  1. MoreFlares Group Title
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    This is the question if the that format threw you off - Suppose a parabola has vertex (–4, 7) and also passes through the point (–3, 8). Write the equation of the parabola in vertex form

    • 2 years ago
  2. asnaseer Group Title
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    do you know what the vertex form for a parabola looks like?

    • 2 years ago
  3. MoreFlares Group Title
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    y = a(x-h)^2 +k

    • 2 years ago
  4. asnaseer Group Title
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    good - now in this form (h, k) represent the coordinates of the vertex

    • 2 years ago
  5. MoreFlares Group Title
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    If I click best response does it say I understand now? or is t just best response so far

    • 2 years ago
  6. asnaseer Group Title
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    and you have been given those in the question

    • 2 years ago
  7. asnaseer Group Title
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    (its just best response so far)

    • 2 years ago
  8. asnaseer Group Title
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    (you would click on Close to close the question once you are satisfied with any answer)

    • 2 years ago
  9. MoreFlares Group Title
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    oh ok, so are you explaining to me how to do this problem itself or just a over view of this concept?

    • 2 years ago
  10. asnaseer Group Title
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    I am trying to /guide/ you to the solution :)

    • 2 years ago
  11. MoreFlares Group Title
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    alright awesome :)

    • 2 years ago
  12. asnaseer Group Title
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    so your first step is to identify what values to substitute for h and k. can you tell me what they should be?

    • 2 years ago
  13. MoreFlares Group Title
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    So the Vertex is: (-4,7) and a point it passes through is (-3,8)

    • 2 years ago
  14. MoreFlares Group Title
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    So h is -4

    • 2 years ago
  15. MoreFlares Group Title
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    and k is 7?

    • 2 years ago
  16. asnaseer Group Title
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    correct - well done! now next step is to substitute those values into the equation.

    • 2 years ago
  17. MoreFlares Group Title
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    y = a(x+4)^2 +7 (I changed the 4 to a positive, would that be correct since it was already a negative?)

    • 2 years ago
  18. asnaseer Group Title
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    perfect! now notice that you just have one unknown left - the variable 'a'

    • 2 years ago
  19. MoreFlares Group Title
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    So solve for a? :/ or would I somehow sub in either the -3 or 8?

    • 2 years ago
  20. asnaseer Group Title
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    you are thinking along the right lines - substitute the values for x and y that are given to you (-3, 8) into the equation and use that to find 'a'

    • 2 years ago
  21. MoreFlares Group Title
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    or would I sub that in for x,y? to solve for a

    • 2 years ago
  22. MoreFlares Group Title
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    oh ok

    • 2 years ago
  23. asnaseer Group Title
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    have you solved for 'a' yet?

    • 2 years ago
  24. MoreFlares Group Title
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    using PEMDAS

    • 2 years ago
  25. asnaseer Group Title
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    yes

    • 2 years ago
  26. MoreFlares Group Title
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    a=1

    • 2 years ago
  27. asnaseer Group Title
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    bingo! so what is your final equation?

    • 2 years ago
  28. MoreFlares Group Title
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    Im kinda confuesed now haha :/ do plug in 1 for a in this equation? 8=1(-3+4)^2+7

    • 2 years ago
  29. asnaseer Group Title
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    you need to plug-in a=1 into this equation:\[y=a(x+4)^2+7\]

    • 2 years ago
  30. MoreFlares Group Title
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    So y = (x + 4)^2 + 7

    • 2 years ago
  31. asnaseer Group Title
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    the one you just gave was using the fact that it passes through the point (-3, 8), so you had substituted x=-3 and y=8 to solve for a.

    • 2 years ago
  32. asnaseer Group Title
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    yes - that is the correct final answer. well done again :)

    • 2 years ago
  33. MoreFlares Group Title
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    What did you mean by this? the one you just gave was using the fact that it passes through the point (-3, 8), so you had substituted x=-3 and y=8 to solve for a.

    • 2 years ago
  34. asnaseer Group Title
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    up there when you said: Im kinda confuesed now haha :/ do plug in 1 for a in this equation? 8=1(-3+4)^2+7

    • 2 years ago
  35. MoreFlares Group Title
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    and thank you so much for your help! :)

    • 2 years ago
  36. MoreFlares Group Title
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    oh yeah

    • 2 years ago
  37. asnaseer Group Title
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    yw :)

    • 2 years ago
  38. MoreFlares Group Title
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    yh :D (you're helpful) lol

    • 2 years ago
  39. asnaseer Group Title
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    my pleasure :D

    • 2 years ago
  40. MoreFlares Group Title
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    Can I give you any ratings?

    • 2 years ago
  41. MoreFlares Group Title
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    stars? feedback? cause you deserve it

    • 2 years ago
  42. asnaseer Group Title
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    this site is using the concept of SmartScore. So as you ask and help out with other peoples questions, your smartscore goes up. It's actual calculation is a mystery but it basically depends on how helpful you are on this site, how much you engage with other users, etc.

    • 2 years ago
  43. asnaseer Group Title
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    and thank YOU for your kind comments - it is always a pleasure to teach someone who really appreciates "learning".

    • 2 years ago
  44. MoreFlares Group Title
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    Oh no problem :) and I bet you developed the formula for the calculations :P "Ask a question: Can anyone develop a top secret and mysterious formula for this site? We're are going to need a genius!!! lol

    • 2 years ago
  45. asnaseer Group Title
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    lol! No it wasn't me - the Admins of this site take care of that aspect.

    • 2 years ago
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