Solving Quadratics from a Graph

Find the roots of the quadratic by graphing.
Hint: In y₁=equation & in y₂=0

• a

• c

• b

Solve by graphing
Hint: In y₁=equation & in y₂=0

• a

• c

• b

• d

Find the roots of the quadratic

• x=2, x=-2

• x=-2

• x=-2, x=1

• x=-2,  x=3

Does this graph in the back have maximum or minimum value?

• maximum

• minimum

• neither

• both

The function below represents the flight of a ball being thrown by a girl who is standing on a box. How long until the ball hits the ground? (Round to the nearest whole number)
y = -1/2x² + 2x + 2?

• 2 seconds

• About 5 seconds

• 0 seconds

• 4 seconds

A raft is dropped from a helicopter 256 feet in the air above the ocean.  Its approximate height, h, after t seconds is given by the function h(t) = -16t² + 256.  How many seconds did it take the raft to hit the water? (Round to the nearest whole number)

• -4

• 2

• 4

• 8

Find the roots by using the table

• a

• c

• b

• d

Find the roots by using the table

• x=-1 , x=0

• x=-2 , x=1

• x= 0

• x= -1 , x=1

What is the Vertex of the graph?

• (-4, -4)

• (0, 0)

• (-8, 0)

• (-2, -3)

What are the X-Intercepts, Roots, Zeros, and Solutions?

• {-8, 0}

• {8, 0}

• {4, -4}

• {-4, -4}