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ciara_chap3 Group Title

Suppose a parabola has vertex (5, –3) and also passes through the point (6, 1). Write the equation of the parabola in vertex form. A. y = (x – 5)2 – 3 B. y = 4(x – 5)2 – 3 C. y = 4(x + 5)2 – 3 D. y = 4(x – 5)2 + 3

  • 2 years ago
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  1. ParthKohli Group Title
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    Play smart.

    • 2 years ago
  2. ParthKohli Group Title
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    Eliminate the choices that DON'T have the vertex = (5,-3).

    • 2 years ago
  3. ciara_chap3 Group Title
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    i know its either a or b but from their i dont know what to do.

    • 2 years ago
  4. ciara_chap3 Group Title
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    just kidding i thought it was -5. so it has to be c since thats the only one with +5

    • 2 years ago
  5. ParthKohli Group Title
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    You're perfectly right. Now check if (6,1) is also a point in both the choices.

    • 2 years ago
  6. ParthKohli Group Title
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    No, it's A or B.

    • 2 years ago
  7. ciara_chap3 Group Title
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    a and b both have -5 its +5

    • 2 years ago
  8. ParthKohli Group Title
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    The standard form is this:\[\rm y = a(x - h)^2 + k\](h,k) is the vertex.

    • 2 years ago
  9. ParthKohli Group Title
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    It's either A or B. Get it now?

    • 2 years ago
  10. ciara_chap3 Group Title
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    yeah i get it now. but how do i check if (6,1) is also a point?

    • 2 years ago
  11. ParthKohli Group Title
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    You plug in 6 for x and 1 for y, then check if both sides are equal.

    • 2 years ago
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