Basics to Quadratics

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

• x = -4

• x = 4

• y = 4

• y = -4

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 another name for the x-intercepts of a quadratic?

• y-intercept

• Zeros

• x-axis

• They don't have another name

Find the axis of symmetry and vertex

• x=3 (3,-3)

• x=4, (4,-4)

• x= -4, (-4,4)

• x=-4 (-4, 60)

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

• (-2, 16)

• (2, 0)

• (2, 4)

• (-2, 4)

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

• 2

• -2

• 1

• -1

What is the green dot on the parabola called?

• maximum

• minumum

• roots

• zeros

The axis of symmetry line passes through which point?

• y-intercept

• any random point

• vertex

• none of these

How many roots does this graph have?

• none

• 1

• 2

• infinite

What's the domain and range?

• D: All Real Numbers 
  R: 6 & all numbers less than 6. 

• D: 6 & all numbers less than 6. 
  R: All Real Numbers

• D: All Real Numbers
  R: 6 & all numbers greater than 6

• D: 6 & all numbers greater than 6.
  R: All Real Numbers