Question

2.

Which equation is represented by the graph?



A. y = 2x2 − 4x + 1

B. y = -1/2x^2 - 2x - 1

C. y = 1/2x^2 + 2x + 1

D. y = −2x2 + 4x + 1

Answer 1

B. y = -1/2x^2 - 2x - 1

Explanation:

If you look at the graph very carefully you will be able to tell the answer is Letter B.

Graph the parabola using the direction, vertex, focus, and axis of symmetry.

Direction: Opens Down

Vertex: ( − 2 , 1 )

Focus: ( − 2 , 1 /2 )

Axis of Symmetry: x = − 2

Directrix: y = 3 /2

x y

− 4 − 1

− 3 1

2 − 2

1 − 1

1 2

0 − 1