SOLUTION: The vertex of this parabola is at (-1, -3). Which of the following could be its equation?

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Question 889232: The vertex of this parabola is at (-1, -3). Which of the following could be its equation?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Anything of the form

y+=+a%28x%2B1%29%5E2+-+3

Since that is in the form y+=+a%28x-h%29%5E2+%2Bk (h,k) = (-1,-3)

'a' can be any number you want.