Quadratics

What is the equation for the axis of symmetry?

• y=3

• x=3

• x=5

• x=1

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

• 2

• -2

• 1

• -1

Which of the following is the correct equation for the given graph?

• f(x) = (x - 2)² - 1

• f(x) = (x + 2)² - 1

• f(x) = -(x + 2)² - 1

• f(x) = -(x - 2)² - 1

What is the formula to find the vertex of a parabola?

• x = -b/2

• x = -b

• x = -b / (2a)

• x = -b / 2

Identify the vertex and whether the graph opens up or down.

• (-1, 4); opens up

• (-1, 4); opens down

• (1, 4); opens up

• (1, 4); opens down

• A

• B

• C

• D

Factor completely n² + 16n + 63

• (n-7)(n+4)

• (n+7)(n-9)

• (n-3)(n-10)

• (n+7)(n+9)

Solve by factoring x² + 13x + 12 = 0

• x = -12, -1

• x = 12, 1

• x = 13, 1

• x = -13, -1

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

• x = 1

• x = -1

• x = -2

• x = 4

A ball is thrown into the air with an upward velocity of 100 ft/s. Its height, h, after t seconds is given by the function h = -16t² + 64t + 960.

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

• 10 seconds

• 64 seconds

• 960 seconds

• 2 seconds