51.1k views
0 votes
The vertex of this parabola is at (-1,-3) which of the following could be its equation

User UnsafePtr
by
8.2k points

2 Answers

3 votes
Since these are parabolas with y being squared, the standard form of such a parabola with vertex at (h, k) is

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

There are no steps. Just look at what is inside the parentheses and compare it to (y - k) with k = -3.
Then look at what is added and compare it to h = -1.

For instance, A has (y + 1) in parentheses. So k = -1. And it has -3 added, so h = -3. That would be a vertex at (-3, -1).
User Citrin
by
8.0k points
2 votes
for
y=a(x-h)^2+k
vertex is (h,k)

it could be
y=a(x+1)^2-3
User MayaGans
by
7.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories