Class Practice 12/1: Quadratic Functions and Their Graphs

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

Where is the axis of symmetry?

• y = -2

• x = 3

• x = -3

• y = 2

What is true for: y = ½(x - 4)² - 4

• Opens up with a minimum

• Opens down with a maximum

• Opens left

• Opens right

If given the equation
y = 3(x + 5)² - 4,
what is the vertex of the parabola?

• (5, -4)
• (-5, -4)
• (-15, -4)
• (15, -4)

For the quadratic equation y = (x-2)² + 10, what is the vertex?

• (2,10)

• (-2, 10)

• (2, -10)

• (0,0)

If a parabola has vertex (5,9) and opens down, what is the range?

What is the x-value of the vertex of

y = 2x² + 8x + 4?

• 2

• -2

• 4

• -4

What is the y-value of the vertex of

y = 2x² + 8x + 4?

• 4

• 28

• -4

• -2

What is the y-intercept of this parabola?

• (−1, 3)
• (−3, 11)
• (−2, 5)
• (0, 5)

Determine the vertex of the parabola:
y = 5x² - 20x + 13

• (5, -7)
• (-2, -7)
• (2, -7)
• (-7, -2)

What is the y-intercept?
f(x) = -2x² + 4x - 6

• (0, 6)
• (0, -6)
• (6, 0)
• (-6, 0)