Question

10.

Which equation is represented by the graph?



A. y = 1/2x^2 - 2x + 1

B. y = x2 − 4x + 1

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

D. y = −x2 − 4x + 1

Answer 1

D. y = −x2 − 4x + 1

Explanation:

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

Direction: Opens Down

Vertex: ( − 2 , 5 )

Focus: ( − 2 , 19 /4 )

Axis of Symmetry: x= − 2

Directrix: y = 21 /4

x y

− 4 1

− 3 4

− 2 5

− 1 4

0 1