Question

4.

Which equation is represented by the graph?



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

B. y = 2x2 − 1

C. y = x2 − 1

D. y = 2x2 + 1

Answer 1

Answer: The answer is NOT Letter C. y = x2 − 1

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

Step-by-step explanation: Math.way

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

Direction: Opens Up

Vertex: ( 0 , 1 )

Focus: ( 0 , 3 /2 )

Axis of Symmetry: x = 0

Directrix: y = 1 /2

x y

− 2 3

− 1 3

2 0

1 1

3 2

2 3

Answer 2

A

Explanation:

You can eliminate B and C because the y intercept in 1, not -1. Then, you can also eliminate D, because it is a linear equation.