Which equation has a graph that is a parabola with a vertex at (–1, –1)?
a. y = (x – 1)2 + 1
b. y = (x – 1)2 – 1
c. y = (x + 1)2 + 1
d. y = (x + 1)2 – 1

The answer is y=(x+1)2-1. The x plus one causes the whole parabola to actually shift to the left by one unit rather than to the right. The subtraction of one causes a vertical shift down by one unit, so the vertex moves from (0,0) to (-1,-1).

Chope you get it right gl