Question

1. The graph opens

a. upward
b. downward

2.The vertex of the graph is
a.(2,5)
b.(-2,-5)
c.(-2,5)

3.The axis of symmetry of the graph is
a.x=2
b.x=-2

Answer 1

1. The coefficient of the squared term (-1/3) is negative, so the graph opens downward.

2. Matching the pattern to
.. y = a(x -h)^2 +k
we find (h, k) = (-2, 5) . . . . . . selection C

3. See the previous answer. The axis of symmetry is
.. x = h
Since h = -2, the axis is x = -2. . . . . . selection B