Standard Form of Quadratic Functions

Which formula allows you to find the x-value of the vertex from a standard form equation?

What is the equation of the axis of symmetry?

• y = 4

• y = -4

• x = 4

• x = -4

This is the standard form of a quadratic function:

f ( x ) = ax² + bx + c

• True

• False

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)

Where is the axis of symmetry for this parabola?

• x = −1

• x = 0

• y = 3

• x = −3

What are the x- intercepts?

• x= 0 and x= -4

• x= 0 and x= 4

• y= 0

• x= 2

Does this graph in the back have maximum or minimum value?

• maximum

• minimum

• neither

• both

Find the y-intercept of f(x) = 2x² - 2x + 1

• (1,0)

• (-2,0)

• (0,1)

• (0, -1)

What is the formula above primarily used for?

• Finding the axis of symmetry from standard form

• Finding the vertex from standard form

• Finding the vertex from vertex form

• Finding the vertex from standard form