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ciara_chap3

  • 3 years ago

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

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  1. ParthKohli
    • 3 years ago
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    Play smart.

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

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

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

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

  6. ParthKohli
    • 3 years ago
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    No, it's A or B.

  7. ciara_chap3
    • 3 years ago
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    a and b both have -5 its +5

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

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

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

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

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