Standard and vertex form of the quadratics

If 'a' is ​ (a)   , then parabola opens ​ (b)   , like a smile.

If 'a' is ​ (c)   , then parabola opens​ (d)   , like a frown.

• positive
• up
• negative
• down
• whole
• left
• right

Identify the parts of the parabola:

maximum

Identify the parts of the parabola:

minimum

The standard form of the quadratic function is​ (a)  

The vertex form of the quadratic function is​ ​ (b)  

b

d

e

5

-8

-5

2

-2

• c

• 15

• a

• 2

• b

• -3

What is the axis of symmetry?
f(x) = x² - 8x + 15.

• x = -4
• x = 4
• y = 4
• y = -4

What is the vertex?
f(x) = -x² - 4x + 12.

• (-2, 16)
• (2, 0)
• (2, 4)
• (-2, 4)

Where is the axis of symmetry for this parabola?

• x = −1
• x = 0
• y = 3
• x = −3