Parabolas Standards Form

What is the equation for the AXIS OF SYMMETRY from the standard form of a quadratic? (also the x-value of the vertex)

Use the graph to determine the x-intercepts.

• -1 and -3

• 1 and -3

• 1 and 3

• -1 and 3

Where is the axis of symmetry for this parabola?

• x = −1

• x = 0

• y = 3

• x = −3

What is the vertex of this parabola?

• (−1, 3)

• (−3, 11)

• (−2, 5)

• (0, 5)

What is the y-intercept of this parabola?

• (−1, 3)

• (−3, 11)

• (−2, 5)

• (0, 5)

• the direction and size of the parabola

• the y-intercept of the parabola

• how many bumps the parabola has

• the x-value of the vertex

Compared to the graph of y=x^2, the graph of y=2x^2 ...

• is stretched vertically, so it is 'skinnier'

• is shrunk vertically, so it is 'wider'

• has a different vertex

• has a different y-intercept

• the y-intercept of the parabola

• the x-intercept of the parabola

• the x-value of the vertex

• the y-value of the vertex

The parabola y = -2x² - 4x + 1 will open

• up

• down

Identify the vertex and correct graph

• A

• B

• C

• D