Quadratic Functions in Vertex Form

The vertex form of a quadratic function is:

f ( x ) = a ( x - h ) ² + k

• True (cierto)

• False (falso)

Here is a quadratic function in vertex form:

f ( x ) = a ( x - h ) ² + k

The axis of symmetry is found by:

• x = a

• x = h

• x = k

Here is a quadratic function in vertex form:

f ( x ) = a ( x - h ) ² + k

The vertex is found by:

• ( h , k )

• ( k , h )

• ( a , h )

• ( a , k )

Identify a, h, k:

f ( x ) = 5 ( x - 4 ) ² + 3

• a = 5, h = -4 , k = 3

• a = 5, h = 4 , k = 3

• a = 5, h = -4 , k = -3

• a = 5, h = 4 , k = -3

Identify a, h, k:

f ( x ) = -2 ( x + 4 ) ² + 6

• a = 2, h = 4 , k = 6

• a = 2, h = -4 , k = 6

• a = -2, h = 4 , k = 6

• a = -2, h = -4 , k = 6

Identify the axis of symmetry:

f ( x ) = -2 ( x + 4 ) ² + 6

• x = -2

• x = -4

• x = 4

• x = 6

Identify the axis of symmetry:

f ( x ) = 5 ( x - 3 ) ² - 9

• x = 5

• x = -3

• x = 3

• x = -9

Identify the vertex:

f ( x ) = 5 ( x - 3 ) ² - 9

• ( 5 , -3 )

• ( 5 , 3 )

• ( -3 , -9 )

• ( 3 , -9 )

Identify the vertex:

f ( x ) = -2 ( x + 5 ) ² + 6

• ( -2 , -5 )

• ( -2 , 6 )

• ( 5 , 6 )

• ( -5 , 6 )