Ali graphs the function f(x) = –(x + 2)2 – 1 as shown. On a coordinate plane, a parabola opens up. It goes through (negative 3, 0), has a vertex at (negative 2, negative 1), and goes through (negative 1, 0). A vertical dashed line at (negative 2, 0) is parallel to the y-axis. Which best describes the error in the graph?
a The axis of symmetry should be x = –1.
b The axis of symmetry should be x = 2.
c The vertex should be a maximum.
d The vertex should be (–2, 1).