Interpreting Quadratic Functions

What is the vertex?

• (5,2)
• (2,5)
• (-2,5)
• (-5,2)

The graph shows the height of a baseball from the time it is thrown from the top of a building to the time it hits the ground. How much time until the baseball is 80 meters above the ground. Select all correct answers.

• 1 sec

• 9 sec

• 7 sec

• 6 sec

The graph below shows h, the height i meters of a model rocket, versus t, the time in seconds after the rocket is launched. From the graph, what conclusion can be made about the flight of the rocket?

• The rocket reaches its maximum height after 2.5 seconds

• At 0 seconds the rocket was 2 meters off the ground

• The height of the rocket was 0 meters when it was launched

• The rocket was in flight for 5 seconds

• All real numbers

The graph shows the height of a ball versus time for one bounce. For how many seconds was the ball at a height of 7 feet or more above the ground?

• 0.25 seconds

• 1 second

• 1.5 seconds

• 1.75 seconds

Select the graph that correctly represents a rocket starting at 0 seconds and landing at 10 seconds.

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