equation for parabola *
- Thread starter tamiatha
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Re: equation for parabola
The "vertex form" for the equation of a parabola with vertex at (h, k) is
y = a(x - h)[sup:20bh88sm]2[/sup:20bh88sm] + k
Your vertex is at (-8, 4)....substitute -8 for h, and 4 for k.
That gives you MOST of the equation of the parabola...all you need to complete the equation is the appropriate value of "a". And since you know the parabola passes through (-6, -2), you can find the value of "a"......take the equation you wrote in the previous step, and substitute -6 for x, and -2 for y. That will give you an equation in which the only variable is "a"....
You REALLY need to show us some work....most of your posts have consisted of questions only. We don't DO homework here.
(Edited to fix an error...thank you, Sir Khan!)
tamiatha said:
The "vertex form" for the equation of a parabola with vertex at (h, k) is
y = a(x - h)[sup:20bh88sm]2[/sup:20bh88sm] + k
Your vertex is at (-8, 4)....substitute -8 for h, and 4 for k.
That gives you MOST of the equation of the parabola...all you need to complete the equation is the appropriate value of "a". And since you know the parabola passes through (-6, -2), you can find the value of "a"......take the equation you wrote in the previous step, and substitute -6 for x, and -2 for y. That will give you an equation in which the only variable is "a"....
You REALLY need to show us some work....most of your posts have consisted of questions only. We don't DO homework here.
(Edited to fix an error...thank you, Sir Khan!)
Re: equation for parabola
half of my posts show work
those that don't mean that i do not know what first step to take
i am trying to learn
if i only wanted answers i would go to ask.com
i appreciate all the help from everyone
since i am older it is harder i think to learn
half of my posts show work
those that don't mean that i do not know what first step to take
i am trying to learn
if i only wanted answers i would go to ask.com
i appreciate all the help from everyone
since i am older it is harder i think to learn
