A1 9-1 Review for Quiz

 $h\left(t\right)=-16t^2+48t+4$  

A ball is thrown upward into the air, its height h after t seconds is given by the function above.

Did the ball start on the ground?

WHAT SHOULD YOU TRY TO FIND TO ANSWER THIS QUESTION?

• y-intercept

• x-intercept

• Axis of Symmetry

• Vertex

 $h\left(t\right)=-16t^2+48t+4$  

A ball is thrown upward into the air, its height h after t seconds is given by the function above.

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

WHAT SHOULD YOU TRY TO FIND TO ANSWER THIS QUESTION?

• y-intercept

• x-intercept

• Axis of Symmetry (x-value of vertex)

• Vertex (y-value of vertex)

 $h\left(t\right)=-16t^2+48t+4$  

A ball is thrown upward into the air, its height h after t seconds is given by the function above.

What is the balls maximum height?

WHAT SHOULD YOU TRY TO FIND TO ANSWER THIS QUESTION?

• y-intercept

• x-intercept

• Axis of Symmetry (x-value of vertex)

• Vertex (y-value of vertex)

 $h\left(t\right)=-16t^2+48t+4$  

A ball is thrown upward into the air, its height h after t seconds is given by the function above.

Did the ball start on the ground?

• yes

• no, it started up 48 feet

• no, it started up 4 feet

 $h\left(t\right)=-16t^2+48t+4$  

A ball is thrown upward into the air, its height h after t seconds is given by the function above.

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

• 1.5 seconds

• 40 seconds

• 384 seconds 

• 6 seconds

$h\left(t\right)=-16t^2+48t+4$

A ball is thrown upward into the air, its height h after t seconds is given by the function above.

What is the balls maximum height?

• 52 feet

• 40 feet

• 384 feet

• 46 feet

A frog is sitting on the ground when he is scared by a big dog. His movement is modeled by the equation h = -6t² + 6t where h is the frog's height at any given time, t . How many seconds until the frog is back on the ground?

WHAT SHOULD YOU TRY TO FIND TO ANSWER THIS QUESTION?

• x-intercepts (factor and solve)

• y-intercept (c-value)

• AoS (-b/2a)

• Vertex (y-value of vertex)

A dolphin jumps from the water at at initial velocity of 16 feet per second. The equation h = -8t² + 16t models the dolphin's height at any given time, t. What is the maximum height the dolphin jumps?

WHAT SHOULD YOU TRY TO FIND TO ANSWER THIS QUESTION?

• x-intercept (factor starting with GCF and solve)

• y-intercept (c-value)

• AoS (-b/2a)

• Vertex (y-value of vertex)

The function f(t) = -5t²+20t + 60 models the approximate height of an object t seconds after it is launched. How many seconds does it take the object to hit the ground?

WHAT SHOULD YOU TRY TO FIND TO ANSWER THIS QUESTION?

• x-intercept (factor and solve)

• y-intercept (c-value)

• AoS (-b/2a)

• Vertex (y-value of vertex)

A frog is sitting on the ground when he is scared by a big dog. His movement is modeled by the equation h = -6t² + 6t where h is the frog's height at any given time, t . How many seconds until the frog is back on the ground?

Hint: Factor (GCF) and Solve.

• 0.5 seconds

• 1 second

• 1.5 seconds

• 2 seconds

• 3 seconds