Quadratic Function Practice

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)

What is the axis of symmetry for the following equation?

y=4x²-8x+9

• x=-8

• x=1

• x=-1

• x=2

Elaine shoots an arrow upward at a speed of 32 feet per second from a bridge that is 28 feet high. The height of the arrow is given by the function h(t) = -16t² + 32t + 28, where t is the time in seconds. What is the maximum height that the arrow reaches?

• A. 24 ft.

• B. 30 ft.

• C. 44 ft

• D. 32 ft.

• (0, 30)

• (0, -30)

• (0, 11)

• (0, -11)

Is the graph concave up or down?

f(x) = -(x + 3)² - 5

• concave up

• concave down

Find the axis of symmetry for
f(x) = 2x²- 8x + 15.

• x = -4
• x = 2
• y = 4
• y = -4

What is the vertex?

• (2, 4)
• (3, -1)
• (0, 8)
• (4, 2)

What is the equation for axis of symmetry?

• y=3
• x=3
• x=5
• x=1

What is the vertex of the function
f(x) = -x²+8x-10?

• (4,6)
• (4,38)
• (-4, -10)
• (8, -10)

A ball is thrown into the air with an upward velocity of 40ft/s. Its height h in feet after t seconds is given by the function :

h(t) = -16t² + 40t + 10

How many seconds does it take the ball to reach its maximum height?

• 1.25 seconds

• 1.4 seconds

• 2.5 seconds

• 2 seconds