Question

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

Answer 1

you know the vertex form of quadratic equation

Answer 2

its

a(x-h)^2 + k

vertex = (h,k)

Answer 3

so with a vertex at (-1, 2)
the equation becomes

a(x-(-1))^2 + 2
= a(x+1)^2 + 2

Answer 4

you need to find "a"

Answer 5

you have some idea how to find "a" ?

(check if any other info is given in the question other than vertex)

Answer 6

thanks it does ask for nothing else

Answer 7

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

Answer 8

oh well the question is weird than