Parabolas (calculator)

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

• x = -4
• x = 4
• y = 4
• y = -4

What is the axis of symmetry of y = 2x² - 4x + 9?

• x = 1
• x = -1
• x = -2
• x = 4

What is the vertex of y = x² + 4x + 3?

• (2,1)
• (-2,1)
• (0,0)
• (-2,-1)

What's the y-intercept of y = 3x² - 6x + 4?

• (4,0)
• (-4,0)
• (0,-4)
• (0,4)

What is the vertex of the parabola:
y = -12x + 22 + 2x²

• (3,4)
• (-3,4)
• (3, -4)
• (-3,-4)

• maximum

• minimum

• neither

• both

What are the zeros of the quadratic function?
y = (x - 5)(x + 3)

• x = -2
  x = -15
• x = -3
  x = 5
• x = 3
  x = -5
• x = 1
  x = -16

• (-2, -8)

• (-2, 8)

• (2, -8)

• (2, 8)

• (0, 0)

• (-4, 0)

• (0, -4)

• (4, 0)