Answer:
f(x) = x^2 - 2
Step-by-step explanation:
This looks like a parabola with the vertex at (0, -2)
It also goes through points (1, -1) and (-1, -1)
The equation: f(x) = a (x - h)^2 + k
f(x) = a x^2 - 2
we see f(1) = -1 = a (1)^2 - 2 ,
-1 = a - 2, a = 1
so f(x) = x^2 - 2
