HA2 Quiz 7.4-6

The focus is always inside the parabola.

• true
• false

The focus is at (2, 0) and the vertex is at (2, -4).  What is the equation of the directrix?

• y = -8

• y = 4

• y = 0

• x = -8

• 3

• 4

• 6

• 12

Write an equation of the parabola with the given characteristics:

Focus: (3, 5)

Vertex: (3, -1)

Write an equation of the parabola with the given characteristics:

Concave Up

Vertex: (-2, 4)

Directrix: y = 2

The vertex, (h, k), is halfway between the focus and the directrix.

• true
• false

For f(x) = 2(x -3 )(x + 4), what are the coordinates of the x-intercepts?

• (3, 0) and (4, 0)

• (0, 3) and (0, 4)

• (3, 0) and (-4, 0)

• -3 and 4

Tags

CCSS.HSF-IF.C.7C

Find the axis of symmetry of f(x) = 4(x + 1)(x - 1).

• y = 0

• x = -1

• y = -1

• x = 0

Find the vertex of f(x) = (x - 4)(x - 2).

• (3, -1)

• (-3, 35)

• (1, 3)

• (-1, 3)

Which quadratic function in factored (intercept) form has x-intercepts of 5 and -2 and is concave down?

• f(x) = 2(x - 5)(x + 2)

• f(x) = -2(x + 5)(x - 2)

• f(x) = -2(x - 5)(x + 2)

• f(x) = 2(x + 5)(x - 2)

Tags

CCSS.HSF-IF.C.7A