Answer:
answer below
Step-by-step explanation:
parabola vertex (h,k): (-1 , 1), pass (0 , -1)
equation: y = a(x-h)² + k
-1 = a (0 - -1)² + 1
a = -2
equation: f(x) = -2(x+1)² + 1
f(1/2 x) = -2(1/2 x + 1)² + 1 ..... horizontal stretch by factor 1/2, (x , y) -> (2x , y)
