explain how to find the equation for the quadratic function that has its vertex at (-1,2) and contains the point (0,-1)

Question

ganeshie8 · Answer

you know the vertex form of quadratic equation

ganeshie8 · Answer

its 

a(x-h)^2 + k

vertex = (h,k)

ganeshie8 · Answer

so with a vertex at (-1, 2)
the equation becomes

a(x-(-1))^2 + 2
= a(x+1)^2 + 2

ganeshie8 · Answer

you need to find "a"

ganeshie8 · Answer

you have some idea how to find "a" ?

(check if any other info is given in the question other than vertex)

anonymous · Answer

thanks it does ask for nothing else

ganeshie8 · Answer

hmm the equation is incomplete
you need to find "a" and plugin the value

anonymous · Answer

oh well the question is weird than