Answer:
y = 2(x +2)^2 -1
Step-by-step explanation:
The vertex form of the equation of a parabola is ...
y = a(x -h)^2 +k . . . . . vertex (h, k), scale factor "a"
We know the vertex, so we can find the scale factor from the other point.
1 = a(-1+2)^2 -1 = a -1
2 = a . . . . . . add 1
The equation of the parabola is ...
y = 2(x +2)^2 -1
