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selenamalter
Group Title
Write the equation of the parabola in vertex form.
A.
y = (x + 1)2 + 3
B.
y = (x + 1)2 – 3
C.
y = (x – 1)2 – 3
D.
y = (x – 1)2 + 3
 one year ago
 one year ago
selenamalter Group Title
Write the equation of the parabola in vertex form. A. y = (x + 1)2 + 3 B. y = (x + 1)2 – 3 C. y = (x – 1)2 – 3 D. y = (x – 1)2 + 3
 one year ago
 one year ago

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selenamalter Group TitleBest ResponseYou've already chosen the best response.0
thats the wrong graph
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
Do you see the zeroes at 1 and 4? The vertex is right in the middle of them: x = 1½. Also the ycoordinate of the vertex seems to be 7½. I cannot match it...
 one year ago

selenamalter Group TitleBest ResponseYou've already chosen the best response.0
hold on let me get the other one
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
Thought so... ;)
 one year ago

selenamalter Group TitleBest ResponseYou've already chosen the best response.0
there
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
What are the coordinates of the vertex?
 one year ago

selenamalter Group TitleBest ResponseYou've already chosen the best response.0
um, (1,3)
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
No, you have to go to the left and down... I get (1, 3).
 one year ago

selenamalter Group TitleBest ResponseYou've already chosen the best response.0
oh okay
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
So if you look at the answer options, that doesn't help much: these same numbers are in every option, sometimes + sometimes ... You can find the right one by comparing this graph with that of the "father of all parabolas": y = x². That one has a vertex in (0, 0). So if x = 0, you get the other coodrinate of the vertex (also 0). In your parabola, you have to set x = 1 to get the vertex, so you get (x+1)² in the formula.
 one year ago

selenamalter Group TitleBest ResponseYou've already chosen the best response.0
(x+1)^2+3
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
That would be all, if the ycoordinate of the vertex was at y = 0, just as the vertex of y = x². But this isn't the case, it lies 3 units lower! OK, just subtract 3 from the formula, result: y = (x+1)²3
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
You added 3, which would make the parabola go 3 units up, instead of down...
 one year ago

selenamalter Group TitleBest ResponseYou've already chosen the best response.0
okay, thank so much for all your help :D
 one year ago

ZeHanz Group TitleBest ResponseYou've already chosen the best response.1
YW! Hope you understand the principle of moving the parabola.
 one year ago
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