Question

Which of the following equations is of a parabola with a vertex at (1, 2)?
y = (x - 1)2 - 2
y = (x - 1)2 + 2
y = (x + 1)2 - 2
y = (x + 1)2 + 2

Answer 1

y = (x - 1)2 + 2

Answer 2

vertex = (-h,k)

Answer 3

We know this because of this fact. A parabola is in a form of y = a(x-h)^2+k. The vertex is h,k. So, if plug 1,2 in, we get y = a(x-1)+2

Answer 4

y = (x + 1)2 - 2 i thought it was this one because this also comes out to =2

Answer 5

\[y=a(x-h)^2 +k\]

Answer 6

y = (x + 1)2 - 2 i thought it was this one because this also comes out to =2

Answer 7

Look at what I gave you for vertex and compare it with your equation.

Answer 8

what is h here and what is k here.
Does the k in the equation you provided equal to the k given in the question?

Answer 9

Oh i see it should be -2!

Answer 10

+2 i mean

Answer 11

yes.

Answer 12

Thanks

Answer 13

No problem.