Re: Finding the Equation of a Parabola using the vertex and 1 point -- Mathematics Help

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Subject: Re: Finding the Equation of a Parabola using the vertex and 1 point

Author:
Kristen

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Date Posted: 09:34:19 10/18/04 Mon
In reply to: Kristen 's message, "Re: Finding the Equation of a Parabola using the vertex and 1 point" on 09:33:14 10/18/04 Mon

>y=a(h-h)* +k (*=^2)
>fill in your points
>15=a(7-5)*+12
>15-12=a(2)*
>3=4a
>a=3/4
>
>Standard, fill in a and vertex
>a(x-h)*+k
>3/4(x-5)*+12
>
>thus that is your equation in standard form

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[> [> [> Subject: Re: Finding the Equation of a Parabola using the vertex and 1 point
Author: QUITTNER [ Edit \| View ]	Date Posted: 07:49:56 10/19/04 Tue Given that the vertex has coordinates (a,b), and the one give point has coordinats (x1,y1) Starting with the equation of a parabola: (y-a)^2 = k * (x-b) We know a and b (the vertex), and we can then use (y1-a)^2 = k * (x1-b) to find k [ Post a Reply to This Message ]

[> [> [> [> Subject: Re: Finding the Equation of a Parabola using the vertex and 1 point
Author: QUITTNER [ Edit \| View ]	Date Posted: 08:05:59 10/19/04 Tue CORRECTION: (Reversing a and b in my previous post): Given that the vertex has coordinates (a,b), and the one given point has coordinates (x1,y1) Starting with the equation of a parabola: (y-b)^2 = k * (x-a) We know a and b (the vertex), and we can then use (y1-b)^2 = k * (x1-a) to find k [ Post a Reply to This Message ]