Axis of symmetry and vertex

Which of the following equations matches standard form of a quadratic?

• ax + by = c
• y = a(x - h)² + k
• y = ax² + bx + c
• y = mx + b

A parabola has a vertex at (2,-3).

Where is the axis of symmetry?

• y = -2

• y = 3

• x = -3

• x = 2

What is the axis of symmetry?

• the slope of the graph
• the dividing line for a parabola
• a way to spin my pencil
• the x-axis

What is the equation for axis of symmetry?

• y=3
• x=3
• x=5
• x=1

What is the vertex?

• (4,-4)
• (2,0)
• (0,2)
• (6,0)

Find the axis of symmetry for
f(x) = x²- 8x + 15.

• x = -4
• x = 4
• y = 4
• y = -4

What's the axis of symmetry of y = 3x² - 6x + 4

• x=1
• x=-6
• x=2
• x=-1

Find the vertex of 
f(x) = -x² - 4x + 12.

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

What is the "formula" for finding the axis of symmetry? 

•  $y=ax^2+bx+c$  

•  $x=\frac{-b}{2a}$  

•  $y=mx+b$  

•  $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$  

Find the vertex of   $y=-2x^2-16x+3$  

• (4, -93)

• (-4, 35)

• (-4,99)

• (8,3)